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Satellite Radio Frequencies


Scarborough, UK
2014 Jul 22
Tuesday, Day 203

Maintained by:


















Satellite and Spacecraft Radio Transmission Frequencies

The list on this page is ordered by spaceraft or satellite name. It groups multiple frequencies from individual satellites. It covers all satellite frequencies that are currently likely to carry signals.

Specifically excluded from being listed are amateur radio satellites (eg Amsat OSCAR satellites and the Soviet/Russian 'Radio' series), and the US military satellite (milsat) point-to-point communications transponders, aboard certain geosynchronous satellites, that can be found near 250 MHz. Information on these can be found on amateur rdio web sites and more-general military radio sites.

In the menu on the left are some selective versions of the list for satellites in particular categories. There is also a list covering the now-defunct HF frequencies from earlier times in the space age. HF frequencies do not appear in the main table below.


Freq (MHz) Satellite Transmission Notes
470.000

Mixed - music and telemetry : Failed to reach orbit, the music consisted of songs in praise of Korean leaders Kim Jong Il and Kim Il Sung. The previous KMS satellite (2009) also failed to reach orbit and was reported to use the same frequency.
2282.500
SGLS 17
AIM
2007-015A
31304
FM NASA - atmospheric studies: Indistinct lines when viewed with SDR and software
400.450
Akebono
1989-016A
19822
CW modulated Studies of Magnetosphere and Ionosphere - Japan: Carrier with data modulation - appears as a tone modulated by a buzz
2207.500
SGLS 2
AMS 2
1977-044A
10033
CW carrier plus side-bands Military meteorological satellite: Advanced Meteorological Satellite - Also transmits at 2237.5MHz and 2252.5 MHz - Frequency Information contributed by the late Ivan Artner
2237.500
SGLS 8
AMS 2
1977-044A
10033
CW - wide sweeping carrier Military meteorological satellite: Advanced Meteorological Satellite - Also transmits at 2207.5MHz and 2252.5 MHz
2252.500
SGLS 11
AMS 2
1977-044A
10033
CW carrier plus side-bands Military meteorological satellite: Advanced Meteorological Satellite - Also transmits at 2207.5 MHz and 2234.5 MHz - Frequency Information contributed by the late Ivan Artner
400.595
AprizeSat
2
2004-025A
28366
Data bursts, approx 35s intervals Data comms: -
2287.500
SGLS 18
Aqua
2002-022A
27424
CW carrier + sidebands Climate research: Frequency is +/-10 kHz
150.012
ARGOS
1999-008A
25634
CW - Doppler tracking beacon USAF space experiments: Coherent transmission at 400.032 MHz - Ceased to transmit 2003
400.032
ARGOS
1999-008A
25634
CW - Doppler tracking beacon USAF space experiments: Coherent transmission at 150.012 MHz - Ceased to transmit 2003
2242.517
SGLS 9
ASTEX
1971-089A
5560
Multiple sidebands - very small dispersion Technology experiments: Old satellite detected as still transmitting during 2008 March
2287.500
SGLS 18
Aura
2004-026A
28376
CW carrier + sidebands Climate research: Frequency is +/-10 kHz
1018.500
Briz-M

CW carrier plus sidebands Space launcher: Final launch vehicle stage, also transmits 1020.5 MHz - first tracked by Sven Grahn
1020.500
Briz-M

CW carrier plus sidebands Space launcher: Final launch vehicle stage, also transmits 1018.5 MHz - first tracked by Sven Grahn
180.011
CBERS 1
1999-057A
25940
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz - and further carriers at +/- 40 kHz Remote sensing: China Brasil Earth Resources Satellite - Coherent transmission at 480.025 MHz - Silent since mid 2003, the last public report being 2003 Jun 6 by Maik Hermenau of www.satellitenwelt.de
480.025
CBERS 1
1999-057A
25940
CW - Doppler tracking beacon Remote sensing: China Brasil Earth Resources Satellite - Coherent transmission at 180.011 MHz - silent since mid-2003
180.014
CBERS 2
2003-049A
28057
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz Remote sensing: China Brazil Earth Resources Satellite - Coherent transmission at 480.037 MHz, also transmits 2204.400 MHz and 2267.500 MHz, ceased to transmit 2007
480.037
CBERS 2
2003-049A
28057
CW - Doppler tracking beacon Remote sensing: China Brazil Earth Resources Satellite - Coherent transmission at 180.014 MHz, also transmits 2204.400 MHz and 2267.500 MHz, ceased to transmit 2007
2204.400
CBERS 2
2003-049A
28057
CW carrier + sidebands Remote sensing: China Brazil Earth Resources Satellite, also transmits 180.014 MHz, 480.037 MHz and 2267.500 MHz, ceased to transmit 2007
2267.500
CBERS 2
2003-049A
28057
CW carrier + sidebands Remote sensing: China Brazil Earth Resources Satellite, also transmits 180.014 MHz, 480.037 MHz and 2204.400 MHz, ceased to transmit 2007
180.013
CBERS 2B
2007-042A
32062
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz Remote sensing: China Brazil Earth Resources Satellite - Coherent transmission at 480.033 MHz, also transmits 2204.400 MHz and 2267.500 MHz. No longer transmitting - switched off 2010 May 10 after an operating anomaly was detected 2010 March.
480.033
CBERS 2B
2007-042A
32062
CW - Doppler tracking beacon Remote sensing: China Brazil Earth Resources Satellite - Coherent transmission at 180.013 MHz, also transmits at 2204.400 MHz and 2267.500 MHz. No longer transmitting - switched off 2010 May 10 after an operating anomaly was detected 2010 March
2204.400
CBERS 2B
2007-042A
32062
CW carrier plus data sidebands Remote sensing: China Brazil Earth Resources Satellite, also transmits 180.013 MHz, 480.033 MHz and 2267.500 MHz. No longer transmitting - switched off 2010 May 10 after an operating anomaly was detected 2010 March
2267.500
CBERS 2B
2007-042A
32062
CW carrier + sidebands Remote sensing: China Brazil Earth Resources Satellite, also transmits 180.013 MHz and 480.033 MHz and 2204.400 MHz. No longer transmitting - switched off 2010 May 10 after an operating anomaly was detected 2010 March
2234.520
Chang'e 1
2007-051A
32273
CW carrier plus data sidebands and secondary carriers - two modes - 2 MHz bandwidth and 256 kHz bandwidth Lunar orbiting satellite: Lunar probe built and launched by the Peoples' Republic of China, originally tracked in HEO and then followed to the Moon. Mission ended 2010 Mar 1 when Chang'e made a retrograde rocket firing and impacted the lunar surface.
2270.000
Chibis-M
2011-062C
38051
Lightning studies satellite: Frequency information provided by Sven Grahn
2249.995
Chuangxin
1-02
2008-056B
33434
CW carrier + sidebands Earth observation - meteorological data for disaster relief: -
2217.500
SGLS 4
Cloudsat
2006-016A
29107
CW carrier + sidebands NASA - cloud & precipitation studies: Frequency is approximate
137.350
Compass 2
2006-019A
29157
CW/AM Russian scientific satellite studying possible ways of predicting earthquakes - not operating properly: After launch on 2006 May 26 - bursts of CW tone one to ten seconds duration in groups with peaks at central frequency and +/- 64 kHz - As of 2006 Nov 16 - data transmission at 64 kHz side bands only
2222.528
SGLS 5
Coriolis
2003-001A
27640
CW carrier plus side-bands Military science satellite: Frequency Information contributed by the late Ivan Artner, also transmits at 2212.504 MHz
2212.504
SGLS 3
Coriolis
2003-001A
27640
CW carrier plus side-bands Military science satellite: Also transmits at 2222.528 MHz
149.970
Cosmos
2336
1996-071A
24677
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.840 MHz
399.920
Cosmos
2336
1996-071A
24677
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.970 MHz
149.910
Cosmos
2341
1997-017A
24772
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.920 MHz
399.760
Cosmos
2341
1997-017A
24772
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.910 MHz
150.030
Cosmos
2361
1998-076A
25590
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Coherent transmission at 400.080 MHz
400.080
Cosmos
2361
1998-076A
25590
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Non operational but still transmitting 2000 December 13 - Coherent transmission at 150.030 MHz
150.300
Cosmos
2373
2000-058A
26552
AM telemetry - wide bandwidth Photographic mapping: Coherent transmission at 400.800 MHz - Cameras and film recovered after mission running between 2000 September 29 and 2000 November 14 - no longer in orbit
400.800
Cosmos
2373
2000-058A
26552
CW - Doppler tracking beacon Photographic mapping: Coherent transmission at 150.300 MHz - Cameras and film recovered after mission running between 2000 September 29 and 2000 November 14 - no longer active
149.940
Cosmos
2378
2001-023A
26818
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.840 MHz
399.840
Cosmos
2378
2001-023A
26818
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.940 MHz
244.512
Cosmos
2385
2001-058B
27056
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2385
2001-058B
27056
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
262.910
Cosmos
2386
2001-058C
27057
Data transmission as messages are forwarded Store and Forward communications: This is a Gonets-D1 even though listed elsewhere as Strela-3. There was a NORAD name mix-up with Gonets D1-8. Has been reported on other frequencies in the past - entry updated 2009 Mar 8.
245.157
Cosmos
2386
2001-058C
27057
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
2298.000
Cosmos
2388
2002-017A
27409
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmitted at at 2298.0 MHz - ceased to operate 2006 November
2304.000
Cosmos
2388
2002-017A
27409
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmitted at 2298.0 MHz - ceased to operate 2006 November
149.970
Cosmos
2389
2002-026A
27436
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.920 MHz
399.840
Cosmos
2389
2002-026A
27436
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.940 MHz
244.512
Cosmos
2390
2002-036A
27464
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2390
2002-036A
27464
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.512
Cosmos
2391
2002-036B
27465
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2391
2002-036B
27465
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
2298.000
Cosmos
2393
2002-059A
27613
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmitted at 2286.0 MHz - ceased to operate 2007 March
2304.000
Cosmos
2393
2002-059A
27613
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmitted at 2286.0 MHz - ceased to operate 2007 March
149.910
Cosmos
2398
2003-023A
27818
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.760 MHz
399.760
Cosmos
2398
2003-023A
27818
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.910 MHz
244.512
Cosmos
2400
2003-037A
27868
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2400
2003-037A
27868
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.512
Cosmos
2408
2004-037A
28419
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2408
2004-037A
28419
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.512
Cosmos
2409
2004-037B
28420
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2409
2004-037B
28420
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
150.300
Cosmos
2415
2005-034A
28841
CW - Doppler tracking beacon Photographic reconnaissance: Coherent transmission at 400.800 MHz - Cameras and film recovered after mission mission running between 2005 September 2 and 2005 October 14 - transmissions heard over the USA - no longer in orbit
400.800
Cosmos
2415
2005-034A
28841
CW - Doppler tracking beacon Photographic reconnaissance: Coherent transmission at 150.300 MHz - Cameras and film recovered after mission running between 2005 September 2 and 2005 October 14? - no longer active
2286.001
Cosmos
2422
2006-030A
29260
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2292.001 MHz, operates only above the northern hemisphere
2292.001
Cosmos
2422
2006-030A
29260
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2286.001 MHz, operates only above the northern hemisphere
2298.000
Cosmos
2430
2007-049A
32268
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2304.0 MHz, operates only above the northern hemisphere
2304.000
Cosmos
2430
2007-049A
32268
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2298.0 MHz, operates only above the northern hemisphere
244.512
Cosmos
2437
2008-025B
32954
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2437
2008-025B
32954
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.512
Cosmos
2438
2008-025C
32955
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2438
2008-025C
32955
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.512
Cosmos
2439
2008-025D
32956
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2439
2008-025D
32956
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
2298.000
Cosmos
2446
2008-062A
33447
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2304.000 MHz, operates only above the northern hemisphere
2304.000
Cosmos
2446
2008-062A
33447
CW carrier plus side-bands Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2298.000 MHz, operates only above the northern hemisphere
244.512
Cosmos
2451
2009-036A
35498
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2451
2009-036A
35498
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
388.688
Cosmos
2452
2009-036B
35499
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 244.999 MHz.
244.512
Cosmos
2453
2009-036C
35500
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2453
2009-036C
35500
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
149.940
Cosmos
2454
2009-039A
35635
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.840 MHz
399.840
Cosmos
2454
2009-039A
35635
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.940 MHz
400.117
Cosmos
2463
2010-017A
36519
CW carrier Positional signal transmissions and store/forward comms: Duplicate of the standard 399.840 MHz transmission noted late-September 2010. The transmitter is faulty.
149.940
Cosmos
2463
2010-017A
36519
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Transmission contains an almanac for all active satellites in the constellation - coherent transmission at 399.840 plus duplicated transmissions at other frequencies around 150 and 400 MHz . The transmitter is faulty.
149.665
Cosmos
2463
2010-017A
36519
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Duplicate of the standard 149.940 MHz transmission at a frequency 275 kHz below it. The transmitter is faulty.
150.215
Cosmos
2463
2010-017A
36519
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Positional signal transmissions and store/forward comms: Duplicate of the standard 149.940 MHz transmission at a frequency 275 kHz above it. The transmitter is faulty.
399.150
Cosmos
2463
2010-017A
36519
CW carrier Positional signal transmissions and store/forward comms: Duplicate of the standard 399.840 MHz transmission at a frequency 690 kHz below it. The transmitter is faulty.
399.703
Cosmos
2463
2010-017A
36519
CW carrier Positional signal transmissions and store/forward comms: Duplicate of the standard 399.840 MHz transmission at a frequency 137 kHz below it. The transmitter is faulty.
399.840
Cosmos
2463
2010-017A
36519
CW - Doppler tracking beacon Positional signal transmissions and store/forward comms: Coherent transmission at 149.940 MHz plus plus duplicated transmissions at other frequencies around 150 and 400 MHz due. The transmitter is faulty.
399.977
Cosmos
2463
2010-017A
36519
CW carrier Positional signal transmissions and store/forward comms: Duplicate of the standard 399.840 MHz transmission at a frequency 137 kHz above it. The transmitter is faulty.
400.530
Cosmos
2463
2010-017A
36519
CW carrier Positional signal transmissions and store/forward comms: Duplicate of the standard 399.840 MHz transmission at a frequency 690 kHz above it. The transmitter is faulty.
244.512
Cosmos
2467
2010-043B
37153
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.
261.035
Cosmos
2467
2010-043B
37153
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.
244.999
Cosmos
2468
2010-043C
37154
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 388.688 MHz.
388.688
Cosmos
2468
2010-043C
37154
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 244.999 MHz.
2292.001
Cosmos
2469
2010-049A
37170
CW Missile early warning: Transmisiion not continuous, also tranmits 2286.001 MHz
2286.001
Cosmos
2469
2010-049A
37170
CW Missile early warning: Transmission not continuous, also transmits 2292.001 MHz
2286.000
Cosmos
2469
2010-049A
37170
Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2298.000 MHz, operates only above the northern hemisphere
2292.000
Cosmos
2469
2010-049A
37170
Missile early warning: OKO satellite in highly eccentric orbit - Also transmits at 2298.000 MHz, operates only above the northern hemisphere
2241.500
Delta
Launch
Vehicle
(Second
Stage)

CW + side-bands Satellite launches: Detectable during on-orbit launch vehicle operations at start of satellite mission
2257.500
SGLS 12
DSCS III
F-1
1982-106B
13637
CW carrier plus side-bands Comms: Possibly defunct, in geosynchronous drift orbit - Frequency Information contributed by the late Ivan Artner
136.440
ERS 15
1966-077C
2412
AM with 1.3 kHz tone Military satellite: Incorrectly catalogued by NORAD as SECOR 7 - (information contributed by Michael D Kenny)
136.260
ERS 20
1967-040D
2768
AM - tone (unstable) USAF test satellite: High orbit, visible for long periods of time - (information contributed by Michael D Kenny)
137.142
Eutelsat I
F4
1987-078B
18351
CW Comms: Regular, intermittent signal possibly due to vehicle rotation causing periodic flow of power from solar panels
180.006
Fengyun 1C
1999-025A
25730
CW carrier on centre frequency plus telemetry sidebands at +/- 5 kHz- and further carriers at +/- 10 kHz Meteorological imaging: Active transmitter until 2007 February when attacked in ground-based interceptor test - Coherent transmission at 480.017 MHz
480.019
Fengyun 1C
1999-025A
25730
CW - Doppler tracking beacon Meteorological imaging: Active transmitter until 2007 February when attacked in ground-based interceptor test - Coherent transmission at 180.007 MHz
180.007
Fengyun 1D
2002-024B
27431
CW carrier on centre frequency plus telemetry sidebands at +/- 5 kHz- and further carriers at +/- 10 kHz Meteorological imaging: Coherent transmission at 480.017 MHz, also transmits 2201.050 MHz
480.017
Fengyun 1D
2002-024B
27431
CW - Doppler tracking beacon Meteorological imaging: Coherent transmission at 180.007 MHz, also transmits 2201.050 MHz
2201.050
Fengyun 1D
2002-024B
27431
CW Meteorological imaging: Appears to be continuous transmission - first noted 2010 September, also transmits 180.007 and 480.017 MHz
2264.700
Fengyun 3A
2008-026A
32958
CW carrier + sidebands Meteorological imaging: Frequency reported 2008, also transmits 2246.400 MHz, below horizon from UK
2246.400
Fengyun 3A
2008-026A
32958
CW carrier + sidebands Meteorological imaging: Frequency reported 2008, also transmits 2264.700 MHz, below horizon from UK
150.012
Formosat
3A
2006-011A
29047
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032 MHz and 1066.752 MHz
1066.752
Formosat
3A
2006-011A
29047
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
400.032
Formosat
3A
2006-011A
29047
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz
150.012
Formosat
3B
2006-011B
29048
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032 MHz and 1066.752 MHz
400.032
Formosat
3B
2006-011B
29048
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz
1066.752
Formosat
3B
2006-011B
29048
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
150.012
Formosat
3C
2006-011C
29049
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032MHz and 1066.752 MHz
400.032
Formosat
3C
2006-011C
29049
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz, during 2007 December, Formosat 3C appeared to be about 5 kHz lower than the nominal frequency - the other frequencies may be shifted pro-rata
1066.752
Formosat
3C
2006-011C
29049
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
150.012
Formosat
3D
2006-011D
29050
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032 MHz and 1066.752 MHz
400.032
Formosat
3D
2006-011D
29050
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz
1066.752
Formosat
3D
2006-011D
29050
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
150.012
Formosat
3E
2006-011E
29051
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032 MHz and 1066.752 MHz
400.032
Formosat
3E
2006-011E
29051
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz
1066.752
Formosat
3E
2006-011E
29051
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
400.032
Formosat
3F
2006
29052
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 1066.752 MHz
1066.752
Formosat
3F
2006
29052
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 150.012 MHz and 400.032 MHz
150.012
Formosat
3F
2006
29052
CW Atmospheric studies: Switched on when observation required, European observations usually 08:00-17:00 UTC Mon-Fri, also transmits 400.032 MHz and 1066.752 MHz
150.012
Geosat
1985-021A
15595
CW - Doppler tracking beacon Oceanography - wave height measurement: Detected being switched on and off over Europe, not continuously active. Sometime around 2007, transmissions ceased to be detected but Geosat was subsequently determined to be transmitting continuously while in sunlight. Coherent transmission at 400.032 MHz
400.032
Geosat
1985-021A
15595
CW - Doppler tracking beacon Oceanography - wave height measurement: Detected being switched on and off over Europe, not continuously active. Sometime around 2007, transmissions ceased to be detected but Geosat was subsequently determined to be transmitting continuously while in sunlight. Coherent transmission at 150.012 MHz
150.012
GFO
1998-007A
25157
CW - Doppler tracking beacon Oceanography - wave height measurement: Geosat Follow On satellite - Coherent transmission at 400.032 MHz and also transmitted at 2207.5 MHz. Ceased to transmit 2008 November.
400.032
GFO
1998-007A
25157
CW - Doppler tracking beacon Oceanography - wave height measurement: Geosat Follow On - Coherent transmission at 150.012 MHz and also transmittedat 2207.5 MHz. Ceased to transmit 2008 November.
2207.487
SGLS 2
GFO
1998-007A
25157
CW carrier plus side-bands Oceanography - wave height measurement: Geosat Follow On - Also transmitted at 150.012 MHz and 400.032 MHz. Ceased to transmit 2008 November.
263.086
Gonets
D1-1
1996-009A
23787
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-1
1996-009A
23787
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
265.059
Gonets
D1-2
1996-009B
23788
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-2
1996-009B
23788
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
265.137
Gonets
D1-3
1996-009C
23789
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 13.

May now be silent, no Message Signal detected 2009 Sept.
264.750
Gonets
D1-4
1997-006D
24728
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-4
1997-006D
24728
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
264.400
Gonets
D1-5
1997-006E
24729
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-5
1997-006E
24729
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
262.910
Gonets
D1-6
1997
24730
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-6
1997
24730
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
262.910
Gonets
D1-7
2001-058D
27058
Data transmission as messages are forwarded Store and Forward communications: Has been reported on other frequencies in the past - entry updated 2009 Mar 8.
245.157
Gonets
D1-7
2001-058D
27058
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
244.512
Gonets
D1-8
2001-058E
27059
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 261.035 MHz.

This is a Stela-3 even though listed elsewhere as Gonets-D1. There was a NORAD name mix-up with Cosmos 2386.
261.035
Gonets
D1-8
2001-058E
27059
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 244.512 MHz.

This is a Strela-3 even though listed elsewhere as Gonets-D1. There was a NORAD name mix-up with Cosmos 2386.
262.910
Gonets
D1-9
2001
27060
Data transmission as messages are forwarded Store and Forward communications: Frequency is changed occasionally - entry updated 2009 Mar 8.

Message Signal at 261.035 MHz.
245.157
Gonets
D1-9
2001
27060
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at another frequency in the 240-260 MHz band
244.999
Gonets M-2
2010-043A
37152
Data transmission as messages are forwarded Store and Forward communications: Message Signal at 388.688 MHz.
388.688
Gonets M-2
2010-043A
37152
Message Signal every 60s, silent when receiving data message from ground Store and Forward communications: Stored messages are transmitted at 244.999 MHz.
388.688
Gonets M-3
2012-041B
38734
Message Signal every 60s or 120s depending on the operating mode, silent when receiving data message from ground. Store and Forward communications: Stored messages are transmitted at 244.999 MHz.
388.688
Gonets M-4
2012-041D
38736
Message Signal every 60s or 120s depending on the operating mode, silent when receiving data message from ground. Store and Forward communications: Stored messages are transmitted at 244.999 MHz.
2273.520
Haiyang 1B
2007-010A
31113
CW plus data sidebands Oceanic Remote Sensing: Weak
2241.600
Huan Jing
1A
2008-041A
33320
CW plus data side-bands Disaster monitoring within China: Part of constellation
2209.797
Huan Jing
1B
2008-041B
33321
CW plus data sidebands Disaster monitoring within China: Strong, Part of constellation
136.410
Isis 1
1969-009A
3669
CW Ionosphere studies: (information contributed by Michael D Kenny)
130.167
ISS
1998-067A
25544
Medium bandwidth FM voice Space station: VHF-2 channel for Russian segment, used as an alternative to VHF-1 (143.625 MHz) during Shuttle/ISS on-orbit operations
130.167
ISS
1998-067A
25544
Ranging pulses Space station: Used by TORU remote control docking system on the Russian segment, usually tested 1-2 days before a Progress docking is due, the Progress return path is at 121.750 MHz
143.625
ISS
1998-067A
25544
Medium bandwidth FM voice Space station: Russian segment VHF-1 channel for communication with Moscow, also used to relay Mission Control to the Shuttle during docking.

Used as part of the ISS Early Communications System over the USA working with the Wallops Facility and White Sands and still used there occasionally but mainly in test mode.

Sven Grahn detected it carrying packet data transmissions during Expedition 1.
145.800
ISS
1998-067A
25544
Amateur Radio downlink frequency Space station: Amateur radio downlink from US segment - see NASA's ARISS Page
145.825
ISS
1998-067A
25544
Amateur Radio downlink frequency Space station: Amateur radio downlink from US segment - see NASA's ARISS Page
628.000
ISS
1998-067A
25544
FM telemetry - sidebands at +/- 128 kHz Space station: Transmission from the Zvezda module.

Transmits on command from within Russia, several times per day - usually in parallel with 630 MHz - Similar transmission format to Soyuz/Progress at 166 MHz but with lower power - part of the BITS telemetry system.
630.000
ISS
1998-067A
25544
FM telemetry - sidebands at +/- 128 kHz Space station: Transmission from the Zvezda module.

Transmits on command from within Russia, several times per day - usually in parallel with 628 MHz - Similar transmission format to Soyuz/Progress at 166 MHz but with lower power - part of the BITS telemetry system.
632.000
ISS
1998-067A
25544
FM telemetry - sidebands at +/- 128 kHz Space station: Transmission from the Zarya module.

Transmissions originally reported by Sven Grahn when Zarya first reached orbit - Similar transmission format to Soyuz/Progress at 166 MHz but with lower power - part of the BITS telemetry system and probably no longer in use
633.909
ISS
1998-067A
25544
FM telemetry - sidebands at +/- 128 kHz Space station: Transmission from the Zarya module. The central frequency is 91 kHz lower than what might be regarded as the norm for this type of transmission.

Transmissions originally reported by Sven Grahn when Zarya first reached orbit - similar transmission format to Soyuz/Progress at 166 MHz but with lower power - part of the BITS telemetry system. Transmissions are infrequent.
2263.600
Kaguya
2007-039A
32054
CW Carrier plus side-bands Lunar orbiting satellite: Japanese built and launched lunar probe - easily detectable, can be observed locking-on to, and releasing, the uplink as it appears or disappears at the lunar limb - transmission appears to be continuous
145.950
Kedr
1998-067CK
37772
Automatic switching between several transmission modes including BPSK telemetry Amateur radio satellite released during Russian EVA from ISS 2011 Aug 3, still operating at the time of re-entry: Ceased to operate on re-entry 2012 Jan 4
145.919
Kedr
1998-067CK
37772
CW - morse code telemetry Amateur radio satellite released during Russian EVA from ISS 2011 Aug 3, still operating at the time of re-entry: Only transmitted at this frequency when 145.950 MHz was being used for BPSK-1000 digital telemetry transmission
145.939
Kedr
1998-067CK
37772
CW - morse code telemetry Amateur radio satellite released during Russian EVA from ISS 2011 Aug 3, still operating at the time of re-entry: Only used when the digital telemetry sytem switched to backup BPSK-400 mode
2298.525
Mars
Orbiter
2013-060A
39370
- Mars exploration:
2200.647
Meteor M-1
2009-049A
35865
CW Meteorology: Appears to be continuous transmission - first noted 2010 September
435.360
MiR
2012-041C
38735
Multiple side bands, varying data content Technology: Noted while checking payloads of 2012-043 Launch
2282.500
SGLS 17
MSX
1996-024A
23851
AM - 1 kHz tone Missile detection experiments: Midcourse Space Experiment, infrared sources with a view to improved design of missile detecting sensors - Frequency Information contributed by the late Ivan Artner
400.552
Munin
2000-075C
26621
AM - modem-type databursts Auroral research - Sweden: Telemetry but silent since 2001 Feb 12 (shortly after launch) probably due to onboard computer failure - no longer active
150.000
Nadezhda

FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Navigation - plus Search and Rescue monitoring: Several satellites - the system is no longer operational, has been silent since 2003 November 26 - Coherent transmission at 400.000 MHz
400.000
Nadezhda

CW - Doppler tracking beacon Navigation - plus Search and Rescue monitoring: Coherent transmission at 150.000 MHz - no longer active (see 150 MHz note)
2227.481
SGLS 6
NATO 4A
1991-001A
21047
PSK with sub-carrier, 1024 kHz Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2227.476
SGLS 6
NATO 4B
1993-076A
22921
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
465.000
Navid
2012-005A
38075
Imaging satellite: Images reported successfully returned, may only be transmitting over Iraq, uplink at 401 MHz
136.500
Nimbus 4
1970-025A
4362
CW - sometimes modulated Meteorology (including imaging): Payload no longer operational - (information contributed by Michael D Kenny)
136.650
NNS O-2
1964-083D
965
CW Carrier plus telemetry tones Navigation: Second operational TRANSIT navsat, navigation system failed soon after launch but transmitter is still active (information contributed by Michael D Kenny)
137.500
NOAA 6
1979-057A
11416
CW - carrier only Meteorological imaging: Inactive satellite but reportedly transmitting
136.770
NOAA 9
1984-123A
15427
CW Formerly meteorological imaging: Telemetry frequency, transmission is intermittent - (information contributed by Michael D Kenny) - Also has a transmission at 137.500 MHz
137.500
NOAA 9
1984-123A
15427
Tone for 6 seconds out of every 25 seconds (periods vary - these are averages) Formerly meteorological imaging: Non-operational satellite but transmitter still had power long after the payload was switched off - Timings shown are as of 2001 January 6 - Probably no longer transmitting at this frequency - Also has a transmission at 136.770 MHz
137.770
NOAA 11
1988-089A
19531
CW Doppler Beacon and telemetry Meteorological imaging: Continuous transmission when operational - (information contributed by Michael D Kenny) - De-commissioned 2004 June 16
2247.500
SGLS 10
NOAA 11
1988-089A
19531
Cyclic carrier - approx 4s on then 4s off Meteorological imaging: Satellite de-commissioned and batteries disconnected 2004 Jun 22 at 16:24:28 UTC - output from STX4 transmitter detected 2009 Oct, probably powered by output from solar cells (only detectable on daylight passes)
137.500
NOAA 12
1991-032A
21263
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Switched off occasionally when transmissions conflict with those from NOAA 15 - Also transmits at 137.770 MHz - De-commissioned 2007 Aug 10
137.770
NOAA 12
1991-032A
21263
CW Doppler Beacon and telemetry Meteorological imaging: Also transmitted at 137.500 MHz - De-commissioned 2007 Aug 10
137.625
NOAA 14
1994-089A
23455
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Switched off occasionally when transmissions conflict with those from NOAA 17 - Also transmits at 137.770 MHz - Decommissioned 2007 May 23
137.770
NOAA 14
1994-089A
23455
CW Doppler Beacon and telemetry Meteorological imaging: Also transmits at 137.625 MHz - Decommissioned 2007 May 23
137.350
NOAA 15
1998-030A
25338
CW Doppler Beacon and telemetry Meteorological imaging: Continuous transmission -(information contributed by Michael D Kenny) - Also transmits at 137.500 MHz
137.500
NOAA 15
1998-030A
25338
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Switched off occasionally when transmissions conflict with those from NOAA 12 - Also transmits at 137.350 MHz
137.350
NOAA 16
2000-055A
26536
CW Doppler Beacon and telemetry Formerly meteorological imaging: Continuous transmission -(information contributed by Michael D Kenny) - Also transmits at 137.500 MHz
137.625
NOAA 17
2002-032A
27453
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Switched off occasionally when transmissions conflict with those from NOAA 14
137.770
NOAA 17
2002-032A
27453
CW Doppler Beacon and telemetry Meteorological imaging: Also transmits at 137.625 MHz
137.100
NOAA 18
2005-018A
28654
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Revised frequency as of 2006 Jan 4, changed from 137.9125 MHz
137.913
NOAA 18
2005-018A
28654
APT at 4 lines per second - interlaced visible light and infrared images Meteorological imaging: Frequency probably not active - changed to 137.100 MHz (2006 Jan 4?)
2247.500
SGLS 10
NOAA 19
2009-005A
33591
Data Metsat: STX4 transmitter - used during launch and contingency, occasionally heard from orbit and heard to switch on and off, detected 2009 Oct
2250.000
Oceansat
P2
2009-051A
35931
CW carrier plus sidebands Ocean Studies: Sun-synchronous orbit, Indian satellite
465.000
Omid
2009-004A
33506
AM - multiple sidebands with 25 kHz bandwidth Testing comms up/down links: Switched on and off by onboard timer programmed from the ground
2277.485
SGLS 16
OPS 4029
1981-107A
12930
CW carrier plus side-bands Multi-tasking military satellite at 41° west longitude?: Geosynchronous orbit Frequency Information contributed by the late Ivan Artner
137.410
OPS 7613-6
1969-082E
4237
CW USAF test satellite: (information contributed by Michael D Kenny)
137.380
OPS 7613-1
1969-082B
4256
Mixed modulation (PAM/FM/AM) Navigation technology: (information contributed by Michael D Kenny)
137.080
OPS 7898-2
1971-110C
5680
CW US military satellite: (information contributed by Michael D Kenny)
2237.518
SGLS 8
OPS 3151
1977-007A
9803
CW carrier plus side-bands DSP - Missile early warning: Defunct satellite in geosynchronous 'graveyard' orbit - Frequency Information contributed by the late Ivan Artner
137.200
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz
137.225
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz
137.250
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz
137.440
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies, individual satellites switch between them - Also transmits at 400.100 MHz
137.460
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies, individual satellites switch between them - Also transmits at 400.100 MHz
137.663
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz
137.688
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz
137.713
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz
137.738
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz
137.800
Orbcomm

Digital data - transmitted to/from mobile terminals Mobile telephony: One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz
400.100
Orbcomm

CW - Doppler tracking beacon Mobile telephony: Several satellites - Also transmitting digitised telephony signals at various frequencies 137-138 MHz (see individual entries)
149.988
Oscar 27
1987-080A
18361
FM telemetry (tones) +/- 2.4 kHz from carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one) - No longer transmitting as of 2008 Jan 1
399.968
Oscar 27
1987-080A
18361
Modulated CW carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one) - No longer transmitting as of 2008 Feb 1
149.979
Oscar 29
1987-080B
18362
Modulated CW carrier Ionospheric modelling for US military (NIMS): Maintenance frequency - Coherent transmission at 399.944 MHz (has been heard to transmit tones similar to the other OSCAR satellite but 2003 December 28 - this frequency was occupied by a modulated 'buzzing' signal - No longer transmitting as of 2008 Feb 1
399.944
Oscar 29
1987-080B
18362
Modulated CW carrier Ionospheric modelling for US military (NIMS): Maintenance frequency - Coherent transmission at 149.979 MHz (known to change between this frequency and the operational one) - No longer transmitting as of 2008 Jan 1
149.988
Oscar 23
1988-033A
19070
FM telemetry (tones) +/- 2.4 kHz from carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one)
399.968
Oscar 23
1988-033A
19070
Modulated CW carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one)
149.988
Oscar 32
1988-033B
19071
FM telemetry (tones) +/- 2.4 kHz from carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one)
399.968
Oscar 32
1988-033B
19071
Modulated CW carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one)
149.988
Oscar 25
1988-074A
19419
FM telemetry (tones) +/- 2.4 kHz from carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one)
399.968
Oscar 25
1988-074A
19419
Modulated CW carrier Ionospheric modelling for US military (NIMS): Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one)
149.979
Oscar 31
1988-074B
19420
FM telemetry (tones) +/- 2.4 kHz from carrier Ionospheric modelling for US military (NIMS): Maintenance frequency - Coherent transmission at 399.944 MHz - Occasionally changes between this frequency and the operational one - Sometime between 2007 Dec 21 and 2008 Feb 7, the normal transmissions at both frequencies were replaced with a highly unstable CW carrier (wandering frequency + variations in strength)
399.944
Oscar 31
1988-074B
19420
Modulated CW carrier Ionospheric modelling for US military (NIMS): Maintenance frequency - Coherent transmission at 149.979 MHz (known to change between this frequency and the operational one) - Sometime between 2007 Dec 21 and 2008 Feb 7, the normal transmissions at both frequencies were replaced with a highly unstable CW carrier (wandering frequency + variations in strength)
150.012
Picosat 9
2001-043B
26930
CW - Doppler tracking beacon USAF Space Test Program (STEP): Coherent transmission at 400.032 MHz - Ceased to transmit late-2004
400.032
Picosat 9
2001-043B
26930
CW - Doppler tracking beacon USAF Space Test Program (STEP): Detected being switched on and off over Europe, not continuously active - Coherent transmission at 150.012 MHz - Ceased to transmit late-2004
166.000
Progress
M-M

Telemetry transmission PCM-FM, sidebands ±128 kHz ISS supplies ferry: 2008-
922.763
Progress
M-M

CW carrier. ISS supplies ferry: Part of the REGUL command and control system - there may be other elements of signals on sidebands around this frequency. 2008-
2264.725
QuikScat
1999-034A
25789
CW + sidebands Ocean surface wind measurement using radar: Stop-gap mission launched to cover for a similar instrument aboard NSCAT, strong signal
150.012
RADCAL
1993-041A
22698
CW - Doppler tracking beacon Radar calibration: Radar Calibration satellite - Coherent transmission at 400.032 MHz, operation is intermittent
400.032
RADCAL
1993-041A
22698
CW - Doppler tracking beacon Radar calibration: Radar Calibration satellite - Coherent transmission at 150.012 MHz, operation is intermittent
465.000
Rasad 1
2011-025A
37675
Testing gravity gradient stabilisation and, possibly, Earth imaging: Uplink at 401 MHz
400.550
Resurs-O1
1998-043A
25394
CW Spread Spectrum Remote sensing: Signals from Little LEO ranging between 400.318 and 400.787 MHz - Piggy-back 'store and forward' communications payload carried by Russian satellite - Transmitter not heard since 2001 February - The meteorological payload transmitted at 137.85 MHz - no longer active
2250.054
RISat 1
2012-017A
38248
- Radar imaging: Identified by Sven Grahn on day of launch
137.300
Russian
Imaging

APT at 2 lines per second Meteorological and remote sensing imaging: Frequency not currently active
137.400
Russian
Imaging

APT at 2 lines per second Meteorological and remote sensing imaging: Frequency not currently active
137.850
Russian
Imaging

APT at 2 lines per second Meteorological and remote sensing imaging: Frequency not currently active
2224.065
Shenzhou

CW carrier plus side-bands Piloted spacecraft: Frequency first detected during the Shenzhou 7 mission (2008 September) by Richard Flagg, Hawaii USA - transmission is probably continuous while in orbit
243.000
Shenzhou

Signal content not known Piloted spacecraft: Recovery beacon transmitted during descent under parachute - NOTE: this is an international distress frequency
2229.605
Shijian
6A
2004-035A
28413
CW carrier + sidebands Science/technology experiments: -
2235.800
Shijian
6B
2004-035B
28414
CW carrier + sidebands Science/technology experiments: Frequency reported 2008
2217.367
Shiyan 2
2004-046A
28479
CW carrier + sidebands Science/technology experiments: Strong, possibly pulsating rapidly
2205.500
Shijian 7
2005-024A
28737
CW carrier + sidebands Science/technology experiments: Frequency reported 2008, also transmits 2227.500 MHz
2227.500
Shijian 7
2005-024A
28737
CW carrier + sidebands Science/technology experiments: Frequency reported 2008, also transmits 2205.500 MHz
2213.600
Shijian
6C
2006-046A
29505
CW carrier + sidebands Science/technology experiments: Frequency reported 2008
2256.251
Shijian
6D
2006-046B
29506
CW carrier + sidebands Science/technology experiments: Weak signal
2224.564
Shijian
6-03A
2008-053A
33408
CW carrier + sidebands Science/technology experiments: -
2235.800
Shijian
6-03B
2008-053B
33409
CW carrier + sidebands Science/technology experiments: Frequency reported by other observers in 2008, but appears to be silent
2251.446
Shijian
6-03B
2008-053B
33409
CW carrier + sidebands Science/technology experiments: Relatively strong signal
2230.795
Shiyan 3
2008-056A
33433
CW carrier + sidebands Science/technology experiments: Weak
136.695
Shinsei
1971-080A
5485
CW Japanese scientific satellite: Continuous transmission - (information contributed by Michael D Kenny)
2202.447
SGLS 1
Sicral 1A
2001-005A
26694
CW carrier plus sub-carriers at 293kHz and 297 kHz Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2227.487
SGLS 6
Skynet 4C
1990-079A
20776
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2227.508
SGLS 6
Skynet 4D
1998-002A
25134
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2227.497
SGLS 6
Skynet 4E
1999-009B
25639
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2227.514
SGLS 6
Skynet 4F
2001-005B
26695
CW carrier plus side-bands Comms: Geosynchronous orbit -
136.800
Solrad 7B
1965-016D
1291
AM IRIG telemetry channels Solar radiation studies (launched 1969): Continuous transmission - (information contributed by Michael D Kenny)
166.000
Soyuz
TMA-M

Telemetry transmission PCM-FM, sidebands ±128 kHz ISS Crew ferry: Digital control system, three crew seats, from 2011
121.500
Soyuz
TMA-M

Morse code 'AN' recovery beacon and direction finding for recovery teams ISS Crew ferry: Digital control system, three crew seats, from 2011 - NOTE: this is an international distress frequency
922.763
Soyuz
TMA-M

CW carrier. ISS Crew ferry: Part of the REGUL command and control system - there may be other elements of signals on sidebands around this frequency. Digital control system, three crew seats, from 2011
121.750
Soyuz
TMA-M

30 kHz deviation FM voice ISS Crew ferry: Digital control system, three crew seats, from 2011
2217.500
SGLS 4
STS

CW carrier plus side bands carrying data ISS Crew/payload transport: Integrated voice and data on SGLS Channel 4 - transmitter operates almost continuously while the payload bay doors are open, also transmitted at 259.7 MHz, 1981-2011
259.700
STS

AM voice ISS Crew/payload transport: Detected over Europe occasionally prior to Shuttle re-entry from ISS operations, and with voice during the orbital injection phase from Kennedy SC to Europe - also transmitted at 2217.500 MHz, 1981-2011
145.990
Suitsat
2005-035C
28933
NFM - extremely weak Amateur radio experiment - life expired Orlan spacesuit equipped with a radio transmitter and released from ISS during a crew EVA: Voice recording + SSTV image - the low power was due to a failed amplifier - Released from ISS 2006 Feb 3 and battery exhausted 2006 Feb 18
2207.130
Telecom 2C
1995-067A
23730
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2205.328
Telecom 2D
1996-044B
24209
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2232.215
Tiangong 1
2011-053A
37820
- Experimental space laboratory: Frequency reported by Richard Flagg, Hawaii. Continuous transmission. Also transmits 2250.720 MHz.
2250.720
Tiangong 1
2011-053A
37820
- Experimental space laboratory: Frequency reported by Richard Flagg, Hawaii. Continuous transmission. Also transmits 2232.215 MHz.
137.500
TIROS-N
1978-096A
11060
CW - carrier only Meteorological imaging: Inactive satellite but reportedly transmitting
136.235
TIROS 10
1965-051A
1430
AM - 1.3 kHz tone Meteorology: Payload now inactive, radio transmission is not continuous - (information contributed by Michael D Kenny)
400.000
Tsikada

CW - Doppler tracking beacon Navigation - plus Search and Rescue monitoring: Coherent transmission at 150.000 MHz - no longer active (see 150 MHz note)
150.000
Tsikada

FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz Navigation - plus Search and Rescue monitoring: Several satellites - the system is no longer operational, has been silent since 2003 November 26 - Coherent transmission at 400.000 MHz
2247.478
SGLS 10
TSX-5
2000-030A
26374
CW carrier Experiments in advanced space technologies: Frequency is unstable, noted as high as 2247.512 MHz, came back on air 2009 November
150.012
Unknown

'Wandering' CW Unidentified satellite: Satellite in GEO, possibly graveyard orbit, also transmits 400.032 MHz
400.032
Unknown

'Wandering' CW Unidentified satellite: Satellite in GEO, possibly graveyard orbit, also transmits 150.012 MHz
2242.493
SGLS 9
USA 8
1985-010B
15543
CW carrier plus side-bands Probably signals intelligence gathering, from geosynchronous orbit: Frequency information from Greg Roberts
2242.515
SGLS 9
USA 21
1987-015A
17506
CW carrier, oscillates in frequency due to satellite spinning at 4.6s per rev US mult--tasking intelligence-gathering and communications satellite: Identification very tentative - highly eccentric orbit, non-operational, the signal oscillation is probably due to the originally de-spun aerial platform having matched rotation with the satellite body, probably an SDS-1 satellite (either F4 or F6) - listed in classfd.tle as 90004
2202.507
SGLS 1
USA 32
1988-078A
19460
CW carrier plus side-bands Electronic intelligence gathering: Also transmits at 2282.5 MHz but transmissions at the two frequencies are not simultaneous
2282.507
SGLS 17
USA 32
1988-078A
19460
CW carrier plus side-bands Electronic intelligence gathering: Observed to switch on and off and does not transmit every rev - at least while over Europe, also transmits 2202.5 MHz but transmissions at the two frequencies are not simultaneous
2242.500
SGLS 9
USA 40
1989-061B
20167
CW carrier, oscillates in frequency due to satellite spinning at 5.2s per rev US mult--tasking intelligence-gathering and communications satellite: Tentative identification of satellite with received signals - non-operational but still transmitting, the signal oscillation is probably due to the originally de-spun aerial platform having matched rotation with the satellite body - identified as 90020 in classfd.tle
2262.493
SGLS 13
USA 46
1989-077A
20253
PSK with sub-carrier, 1024 kHz Comms: Frequency Information contributed by the late Ivan Artner
2242.496
SGLS 9
USA 67
1990-097B
20963
PSK with sub-carrier, 1024 kHz Multi-tasking military satellite near 75° east longitude: Originally GEO but the orbit has evolved to an inclination of 15° and is slightly elliptical so reception varies according to the sub-satellite latitude - a study by Ivan Artner 2006 March showed that the transmitter responds to eclipse periods by becoming intermittent while out of direct sunlight, indicating that the batteries are not charging properly from the solar cells
2222.508
SGLS 5
USA 69
1991-017A
21147
CW carrier plus side-bands Radar imaging reconnaissance: Frequency Information originally contributed by the late Ivan Artner - later confirmed by other observers
2232.511
SGLS 7
USA 75
1991-080B
21805
FM wide-bandwidth data Geosynchronous missile early warning at 38° west longitude: Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner
2237.496
SGLS 8
USA 75
1991-080B
21805
CW carrier plus side-bands Geosynchronous missile early warning at 38° west longitude: Defense Support Program - Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner
250.150
USA 76
1991-076D
21808
CW carrier detectable at 250.158 MHz then a series weaker carriers up and down from this frequency at 9.6 kHz intervals between approximate limits of 250.0 and 250.25 MHz US Military ocean surveillance: Navy Ocean Surveillance System, transmission is probably from a secondary payload - Transmission intermittent - First reported 2005 September then went into a period of silence - (the listed satellite is one of a cluster)
2277.500
SGLS 16
USA 78
1992-006A
21873
CW carrier plus side-bands Comms: Defunct satellite in geostationary drift orbit - Frequency Information contributed by the late Ivan Artner
258.150
USA 81
1992-023A
21949
AM - data plus modulated tones at 4.8 and 9.6 kHz Electronic intelligence gathering: European observations indicates that it is switched on and off on command from ground stations in Italy and Spain - also transmits at 2202.5 MHz and 2257.53 MHz, no longer active
2257.530
SGLS 12
USA 81
1992-023A
21949
CW carrier plus side-bands Electronic intelligence gathering: Also transmits at 2202.5 MHz and 258.150 MHz, , frequency may be active intermittently
2202.513
SGLS 1
USA 81
1992-023A
21949
CW carrier plus side-bands Electronic intelligence gathering: Also transmits at 2257.530 MHz, thought to be no longer active but detected early 2011
2242.500
SGLS 9
USA 89
1992-086B
22518
CW carrier plus side-bands US mult--tasking intelligence-gathering and communications satellite, now deactivated: During 2006, Ivan Artner tracked a spinning satellite in HEO, the times did not fit known satellites in that type of orbit - it has been tentatively identified as 90026 (last observed in 2004) but transmissions ceased during the first quarter of 2007 before an orbit could be determined, the identification of it as USA-89 is also tentative
2252.490
SGLS 11
USA 95
1993-056A
22787
CW carrier plus side-bands Comms: Frequency Information contributed by the late Ivan Artner
2257.512
SGLS 12
USA 97
1993-074A
22915
CW carrier plus side-bands Comms: Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
243.825
USA 99
1994-009A
22988
Spread spectrum signal - +/- 64 kHz from centre frequency Comms: Tentative identification (may be more than one satellite) in geosynchronous orbit, can be heard with relatively simple receiver/antenna setup - in CW mode, it sounds like trickling water!
2262.509
SGLS 13
USA 99
1994-009A
22988
CW carrier plus side-bands Comms: Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2232.496
SGLS 7
USA 105
1994-054A
23223
CW carrier plus side-bands Multi-tasking military satellite at 27°.5 west longitude: Geosynchonous orbit - Frequency Information contributed by the late Ivan Artner
2277.500
SGLS 16
USA 105
1994-054A
23223
CW carrier plus side-bands Multi-tasking military satellite at 27°.5 west longitude: Frequency Information contributed by the late Ivan Artner
2252.500
SGLS 11
USA 109
1995-015A
23533
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program, - Frequency Information contributed by the late Ivan Artner
2237.515
SGLS 8
USA 109
1995-015A
23533
CW + side-bands Military meteorological satellite: Defense Meteorological Satellite Program
2242.485
SGLS 9
USA 116
1995-066A
23728
CW carrier + sidebands Digital transmission, multi-tasking reconnaissance satellite: Identified from a single radio observation (early 2008) which is not normally sufficient. However, there is significant circumstantial evidence that the identification is correct.

No longer in orbit
2232.495
SGLS 7
USA 118
1996-026A
23855
CW carrier plus side-bands Multi-tasking military satellite at 13° west longitude?: Geosynchonous orbit - Frequency Information contributed by the late Ivan Artner
250.158
USA 121
1996-029D
23862
AM - 4.8 kHz data tone US Military ocean surveillance: Navy Ocean Surveillance System, transmission is probably from a secondary payload and is on for extended periods - no reports of any switch on/off activity - (the listed satellite is one of a cluster)
243.695
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 1, no longer transmitting.
243.705
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 2, no longer transmitting.
243.710
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 3, no longer transmitting.
243.715
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 4, no longer transmitting.
243.720
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 5, no longer transmitting.
243.725
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 6, no longer transmitting.
243.730
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 7, no longer transmitting.
243.735
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 8, no longer transmitting.
243.740
USA 125
1996-038A
23945
Channel usually occupied by an unmodulated carrier US comms and intelligence gathering: AFSATCOM Channel 9, no longer transmitting.
243.745
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 10, no longer transmitting.
243.750
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 11, no longer transmitting.
243.760
USA 125
1996-038A
23945
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 12, no longer transmitting.
2242.498
SGLS 9
USA 125
1996-038A
23945
CW carrier plus side-bands US comms and intelligence gathering: Formerly part of the operational constellation of three SDS satellites in highly eccentric orbit (HEO) - Also transmitted AFSATCOM signal near 243.7 MHz. The S-band transmission from USA-125, an SDS-2 satellite, was at a lower power than the SDS-3 satellites. Ceased to transmit around 2010 Aug 31 when either the transmitter was switched off, or the satellite was guided to a destructive re-entry.
2252.493
SGLS 11
USA 127
1996-042A
23967
PSK with sub-carrier, 1.7 MHz Comms: Frequency Information contributed by the late Ivan Artner
2242.485
SGLS 9
USA 129
1996-072A
24680
CW carrier plus side-bands Imaging reconnaissance: Possible small error in the frequency measurement
2237.500
SGLS 8
USA 131
1997-012A
24753
CW + side-bands Military meteorological satellite$: Defense Meteorological Satellite Program
2222.502
SGLS 5
USA 133
1997-064A
25017
CW carrier plus side-bands Radar imaging reconnaissance: Frequency Information contributed by the late Ivan Artner
243.695
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 1, no longer transmitting.
243.705
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 2, no longer transmitting.
243.710
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 3, no longer transmitting.
243.715
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 4, no longer transmitting.
243.720
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 5, no longer transmitting.
243.725
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 6, no longer transmitting.
243.730
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 7, no longer transmitting.
243.735
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 8, no longer transmitting.
243.740
USA 137
1998-005A
25148
Channel usually occupied by an unmodulated carrier US comms and intelligence gathering: AFSATCOM Channel 9, no longer transmitting.
243.745
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 10, no longer transmitting.
243.750
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 11, no longer transmitting.
243.760
USA 137
1998-005A
25148
CW - RTTY-style data US comms and intelligence gathering: AFSATCOM Channel 12, no longer transmitting.
2242.495
SGLS 9
USA 137
1998-005A
25148
CW carrier plus side-bands US comms and intelligence gathering: Part of a constellation of three satellites in highly eccentric orbit (HEO), switches to low power when over the southern hemisphere - formerly transmitted AFSATCOM signal near 243.7 MHz. Reported still active 2013 May. Lost to visual observers because of changes brought about gravity effects and air drag on the eccentric orbit.
2237.495
SGLS 8
USA 142
1999-017A
25669
CW carrier plus side-bands Missile early warning: Defense Support Program, suffered mission failure, satellite stranded in geosynchronous transfer orbit - Frequency Information contributed by the late Ivan Artner
2252.490
SGLS 11
USA 146
1999-063A
25967
PSK with sub-carrier, 1.7 MHz Comms: Frequency Information contributed by the late Ivan Artner - co-located so this may be UFO-F11
150.012
USA 147
1999-067A
25991
CW - Doppler tracking beacon Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2207.535 MHz, 2237.5 MHz and 2252.5 MHz, and 400.032 MHz - Post-launch testing revealed interference with other equipment from the 150/400 MHz transmitters so they remained inactive (apart from further testing) until 2006 Aug 14
400.032
USA 147
1999-067A
25991
CW - Doppler tracking beacon Military meteorological satellite: Defense Meteorological Satellite Program - also transmits at 2207.535 MHz, 2237.5 MHz, and 150.012 MHz - Post-launch testing revealed interference with other equipment from the 150/400 MHz transmitters so they remained inactive (apart from further testing) until 2006 Aug 14 .
2237.517
SGLS 8
USA 147
1999-067A
25991
CW - wide sweeping carrier Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2207.535 MHz, 2252.5 MHz, 150.012 MHz and 400.032 MHz (the last two are the RADCAL frequencies)
2252.499
SGLS 11
USA 147
1999-067A
25991
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2207.535 MHz, 2237.5 MHz, 150.012 MHz and 400.032 MHz (the last two are the RADCAL frequencies)
2207.535
SGLS 2
USA 147
1999-067A
25991
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2252.5 MHz, 150.012 MHz and 400.032 MHz (the last two are the RADCAL frequencies)
2232.498
SGLS 7
USA 149
2000-024A
26356
FM wide-bandwidth data Geosynchronous missile early warning at 8°.5 east longitude: Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner
2237.480
SGLS 8
USA 149
2000-024A
26356
PSK with sub-carrier, 1024 kHz Geosynchronous missile early warning at 8°.5 east longitude: Defense Support Program - Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner
2222.476
SGLS 5
USA 152
2000-047A
26473
CW carrier plus side-bands Military radar reconnaissance satellite: -
2257.508
SGLS 12
USA 153
2000-065A
26575
PSK with sub-carrier, 1024 kHz Comms: Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
251.325
USA 155
2000-080A
26635
AM - 4.8 kHz data tone US intelligence-related satellite near 10° west longitude: One of a triplet of similar of transmissions from a secondary payload on a US classified satellite in GEO, signal appears to be continuous and is similar to ones from USA-179 - Also transmits at 252.675 MHz, 258.775 MHz, 268.6755 MHz and 2242.486 MHz. No longer operational.
268.675
USA 155
2000-080A
26635
AM - 4.8 kHz data tone US intelligence-related satellite near 10° west longitude: One of a triplet of similar of transmissions from a secondary payload on a US classified satellite in GEO, signal appears to be continuous and is similar to ones from USA-179 - Also transmits at 251.325 MHz, 252.675 MHz, 258.775 MHz and 2242.486 MHz. No longer operational.
2242.486
SGLS 9
USA 155
2000-080A
26635
PSK with sub-carrier, 1024 kHz US intelligence-related satellite near 10° west longitude: Geosynchronous orbit, frequency variable according to onboard power available - increases significantly at times of eclipse. Also transmitted at 251.325 MHz, 252.675, 258.775 and 268.775 MHz. No longer operational.
252.675
USA 155
2000-080A
26635
AM - high speed (19.2 kb/s?) data transmission US intelligence-related satellite near 10° west longitude: Transmissions from a secondary payload on a US classified satellite in GEO, signal appears to be continuous - Also transmits at 251.325 MHz, 258.775 MHz, 268.675 MHz and 2242.486 MHz. No longer operational.
258.775
USA 155
2000-080A
26635
AM - 4.8 kHz data tone US intelligence-related satellite near 10° west longitude: One of a triplet of similar of transmissions from a secondary payload on a US classified satellite in GEO, signal appears to be continuous and is similar to ones from USA-179 - Also transmits at 251.325 MHz, 252.675 MHz, 268.675 MHz and 2242.486 MHz. No longer operational.
2232.497
SGLS 7
USA 159
2001-033A
26880
FM wide-bandwidth data Geosynchronous missile early warning at 70° east longitude: Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner
2237.499
SGLS 8
USA 159
2001-033A
26880
PSK with sub-carrier, 1024 kHz Geosynchronous missile early warning at 70° east longitude: Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner
2277.500
SGLS 16
USA 160
p/l 1
2001-040A
26905
CW carrier plus side-bands Ocean SIGINT: Navy Ocean Surveillance System - Frequency Information contributed by the late Ivan Artner, also transmits at 2232.5 MHz
2232.495
SGLS 7
USA 160
p/l 1
2001-040A
26905
CW carrier plus side-bands Ocean SIGINT: Also reported to transmit 2277.5 MHz
2242.485
SGLS 9
USA 161
2001-044A
26934
CW carrier + sidebands Digital transmission, multi-tasking reconnaissance satellite: -
250.075
USA 162
2001-046A
26948
AM - 4.8 kHz data tone US intelligence-related satellite near 144° west longitude, possibly including communications: One of a triplet of reported frequencies carrying similar signals from satellite in geosynchronous orbit, exact frequency not known - also reported to transmit at 256.475, 263.225, 267.550 MHz and 2242.5 MHz
263.225
USA 162
2001-046A
26948
AM - high speed (19.2 kb/s?) data transmission US intelligence-related satellite near 144° west longitude, possibly including communications: Reported frequency for a satellite in geosynchronous orbit, exact frequency not known - also reported to transmit at 250.075 MHz,256.475, 267.550 MHz and 2242.5 MHz
267.550
USA 162
2001-046A
26948
AM - 4.8 kHz data tone US intelligence-related satellite near 144° west longitude, possibly including communications: One of a triplet of reported frequencies carrying similar signals from satellite in geosynchronous orbit, exact frequency not known - also reported to transmit at 250.075 MHz, 256.475 MHz, 263.225MHz and 2242.5 MHz
2242.500
SGLS 9
USA 162
2001-046A
26948
CW carrier (plus side-bands?) US intelligence-related satellite near 144° west longitude, possibly including communications: Reported frequency for satellite in geosynchronous orbit - also reported to transmit at 250.075 MHz, 256.475, 263.225 and 267.550 MHz
256.475
USA 162
2001-046A
26948
AM - 4.8 kHz data tone US intelligence-related satellite near 144° west longitude, possibly including communications: One of a triplet of reported frequencies carrying similar signals from satellite in geosynchronous orbit, exact frequency not known - also reported to transmit at 250.075, 263.225, 267.550 MHz and 2242.5 MHz
2262.507
SGLS 13
USA 164
2002-001A
27168
CW carrier plus side-bands Comms: Also transmits 2267.513 MHz, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2267.513
SGLS 14
USA 164
2002-001A
27168
CW carrier plus side-bands Comms: Occasional transmission - Also transmits 2262.507 MHz MHz, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2257.511
SGLS 12
USA 167
2003-008A
27691
CW carrier plus side-bands Comms: Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner
2222.481
SGLS 5
USA 172
2003-048A
28054
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2207.5, MHz, 2237.5 MHz and 2247.5 MHz
2237.512
SGLS 8
USA 172
2003-048A
28054
CW + side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2207.5 MHz, 2222.473 MHz and 2247.415 MHz
2207.510
SGLS 2
USA 172
2003-048A
28054
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2222.5 MHz, 2237.5 MHz and 2247.5 MHz
2222.500
SGLS 5
USA 173
p/l 1
2003-054A
28095
CW carrier plus side-bands Ocean SIGINT: Navy Ocean Surveillance System - Also transmits at 2232.5 MHz. Frequency Information contributed by the late Ivan Artner
2232.498
SGLS 7
USA 173
p/l 1
2003-054A
28095
CW carrier plus side-bands Ocean SIGINT: Transmission may be from 28097 (NOSS 3-2 follower). Also reported to transmit at 2222.5 MHz
2262.499
SGLS 13
USA 174
2003-057A
28117
PSK with sub-carrier, 1.7 MHz Comms: Frequency Information contributed by the late Ivan Artner - co-located so this may be UFO-F10
251.700
USA 179
2004-034A
28384
AM - 4.8 kHz data tone US intelligence-related satellite: One of a pair of transmissions from a secondary payload on US classified satellite in HEO - Switched on and off to co-ordinate coverage with USA-198 - Prior to 2008 Mar 14, USA-179 was operating alone and was providing near 8 hours' coverage per pass at this frequency - Also transmits at 256.375 MHz and 2242.50 MHz
2242.503
SGLS 9
USA 179
2004-034A
28384
CW carrier plus side-bands - strong US intelligence-related satellite: Part of a constellation of three satellites in highly eccentric orbit (HEO), switches to low power when over the southern hemisphere - Also transmits at 251.700 MHz and 256.375 MHz
256.375
USA 179
2004-034A
28384
AM - 4.8 kHz data tone US intelligence-related satellite: One of a pair of transmissions from a secondary payload on US classified satellite in HEO - Switched on and off to co-ordinate coverage with USA-198 - Prior to 2008 Mar 14, USA-179 was operating alone and was providing near 8 hours' coverage per pass at this frequency - Also transmits at 251.700 MHz and 2242.50 MHz
2222.500
SGLS 5
USA 181
p/l 1
2005-004A
28537
CW carrier plus side-bands Navy Ocean Surveillance System SIGINT: Navy Ocean Surveillance System - also transmits at 2232.5 MHz and 2277.5 MHz - latter frequency Information contributed by the late Ivan Artner
2232.500
SGLS 7
USA 181
p/l 1
2005-004A
28537
CW carrier plus side-bands Navy Ocean Surveillance System SIGINT: Also reported to transmit at 2222.5 MHz and 2277.5 MHz - latter frequency Information contributed by the late Ivan Artner
2277.500
SGLS 16
USA 181
p/l 1
2005-004A
28537
CW carrier plus side-bands Navy Ocean Surveillance System SIGINT: Navy Ocean Surveillance System, also transmits at 2222.5 MHz and 2232.5 MHz
2242.505
SGLS 9
USA 186
2005-042A
28888
CW carrier + sidebands Reconnaissance satellite: -
2232.517
SGLS 7
USA 184
2006-027A
29249
CW carrier plus side-bands : Also transmits at 2277.5 MHz - Frequency Information contributed by the late Ivan Artner
2277.520
SGLS 16
USA 184
2006-027A
29249
CW carrier plus side-bands : Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner
2222.497
SGLS 5
USA 191
2006-050A
29522
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2237.515 MHz and (according to observations by the late Ivan Artner) at 2249.415 MHz
2237.514
SGLS 8
USA 191
2006-050A
29522
CW Military meteorological satellite: Defense Meteorological Satellite Program - Also transmits at 2222.5 MHz and 2247.415 MHz
2249.500
USA 193
2006-057A
29651
CW carrier plus side-bands US intelligence-related satellite: Satellite failed soon after launch 2006 December - no longer transmitting Frequency Information contributed by the late Ivan Artner
2232.498
SGLS 7
USA 194
p/l 1
2007-027A
31701
CW carrier + side bands Navy Ocean Surveillance System - ocean SIGINT: Transmission may be from the NOSS 3-4 follower
2232.504
SGLS 7
USA 197
2007-054A
32287
CW carrier plus side-bands Geosynchronous missile early warning: Defense Support Program - Frequency Information contributed by Greg Roberts
251.275
USA 198
2007-060A
32378
AM - 4.8 kHz data tone plus various test modes Intelligence-related satellite, possibly including communications: One of a pair of transmissions from a secondary payload on US classified satellite in HEO used during the test phase of the satellite up until 2008 March 13 - on March 14, USA-198 switched to its operational frequencies at 251.700 MHz and 256.375 MHz, test transmission also at 258.800 MHz, plus transmitter at 2242.50 MHz
2242.504
SGLS 9
USA 198
2007-060A
32378
CW carrier plus side-bands - strong Intelligence-related satellite, possibly including communications: Part of a constellation of three satellites in highly eccentric orbit (HEO), lanched 2007 Dec 10 as a replacement for USA-125, also transmits at 251.700 MHz and 256.375 MHz, and used 251.275 and 258.800 MHz during the orbital test phase up to 2008 Mar 13

Frequency discovered independently by Bob Christy and Sven Grahn about 20 minutes after launch.
251.700
USA 198
2007-060A
32378
AM - 4.8 kHz data tone Intelligence-related satellite, possibly including communications: One of a pair of transmissions from a secondary payload on US classified satellite in HEO - Switched on and off to co-ordinate coverage with USA-179 - Also transmits at 256.375 MHz and 2242.50 MHz
256.375
USA 198
2007-060A
32378
AM - 4.8 kHz data tone Intelligence-related satellite, possibly including communications: One of a pair of transmissions from a secondary payload on US classified satellite in HEO - Switched on and off to co-ordinate coverage with USA-179 - Also transmits at 251.700 MHz and 2242.50 MHz
258.800
USA 198
2007-060A
32378
AM - 4.8 kHz data tone plus various test modes Intelligence-related satellite, possibly including communications: One of a pair of transmissions from a secondary payload on US classified satellite in HEO used during the test phase of the satellite up until 2008 March 13 - on March 14, USA-198 switched to its operational frequencies at 251.700 MHz and 256.375 MHz, sharing duties with USA-179 - Test transmission also at 251.275 MHz, plus transmitter also at 2242.50 MHz
2232.498
SGLS 16
USA 198
2007-060A
32378
CW carrier plus side-bands Intelligence-related satellite, possibly including communications: Navy Ocean Surveillance System
2203.700
USA 205
2009-023A
34903
CW carrier + sidebands Development of missile sensors: Frequency not measured precisely
2252.506
SGLS 11
USA 207
2009-047A
35815
CW carrier + sidebands Comms: Initial reception reported by Greg Roberts (SA) some 38 minutes after lift-off
2247.499
SGLS 10
USA 208
2009-052A
35937
CW carrier plus sidebands STSS Demonstrator dual satellite mission together with USA 209 testing missile detection technology: Frequency shows variability, possibly due to internal electrical power loading. Transmission frequency sometimes locked to the uplink leading to dual Doppler effect.

See 2272.5 MHz for USA-209.
2272.514
SGLS 15
USA 209
2009-052B
35938
CW carrier plus sidebands STSS Demonstrator dual satellite mission together with USA 208 testing missile detection technology: Frequency shows variability, possibly due to internal electrical power loading. Transmission frequency sometimes locked to the uplink leading to dual Doppler effect.

See 2247.5 MHz for USA-208.
2222.487
SGLS 5
USA 210
2009-057A
35951
CW carrier plus side-bands Military meteorological satellite: Defense Meteorological Satellite Program
2237.517
SGLS 8
USA 210
2009-057A
35951
CW carrier plus sidebands Military meteorological satellite: Strong carrier
2262.505
SGLS 13
USA 214
2010-039A
36868
CW carrier, for a period after launch, the received frequency was oscillating because of Doppler shift caused by rotation Comms: Unable to reach GEO using designated thrusters so manoeuvred to GEO over a long period using its station-keeping thrusters
2242.506
SGLS 9
USA 215
2010-046A
37162
CW Reconnaissance using radar: Discovered by Bob Christy immediately after launch
400.180
USA 217
2010-062A
37222
Trigger pulse for ground ground-based transmitters at 16s intervals Military space technology experiments incl Store-Dump comms: Transmission from Ocean Data Telemetry Microsat Link payload to collect data from sensors on such as ocean data buoys or small, unattended ground stations. Transmits only when in range of an active sensor.
2242.514
SGLS 9
USA 224
2011-002A
37348
CW carrier + sidebands Digital transmission, multi-tasking reconnaissance satellite: Discovered by Bob Christy on day of launch. Intensive radio tracking over first few days allowed good determination of the orbit for acquisition by visual observers.
2242.504
SGLS 9
USA 227
2011-011A
37377
Carrier + sidebands US intelligence-related satellite near 10° west longitude: Continous transmission
2242.506
SGLS 9
USA 234
2012-014A
38109
Carrier + sidebands Reconnaissance using radar:
2212.810
Yaogan 1
2006-015A
29092
CW carrier (+sidebands?) Remote sensing with synthetic aperture radar, government and military: European observations tend to be on southbound passes (these occur between passes over the PRC mainland), also transmits 2295.650 MHz. No longer active - Yaogan 1 broke into several pieces 2010 Feb 4.
2295.650
Yaogan 1
2006-015A
29092
CW carrier (+sidebands?) Remote sensing with synthetic aperture radar, government and military: Frequency reported 2008, also transmits 2212.810 MHz. No longer active - Yaogan 1 broke into several pieces 2010 Feb 4.
2216.527
Yaogan 2
2007-019A
31490
CW carrier (+sidebands?) Optical remote sensing - military or government: -
2212.809
Yaogan 3
2007-055A
32289
CW carrier (+sidebands?) Remote sensing, possible military connection - reportedly equipped with a synthetic aperture radar: May not transmit on all passes - European observations are more common on southbound passes (these occur between passes over the PRC mainland), also transmits 2295.650 MHz
2295.650
Yaogan 3
2007-055A
32289
CW carrier (+sidebands?) Remote sensing, possible military connection - reportedly equipped with a synthetic aperture radar: Frequency reported 2008, also transmits 2212.810 MHz
2216.525
Yaogan 4
2008-061A
33446
CW carrier (+sidebands?) Optical remote sensing - military or government: -
2220.476
Yaogan 5
2008-064A
33456
CW carrier (+sidebands?) Remote sensing, possible military connection - reportedly equipped with a synthetic aperture radar: Also reportedly transmits 2282.1 MHz
2282.100
Yaogan 5
2008-064A
33456
CW carrier (+sidebands?) Remote sensing, possible military connection - reportedly equipped with a synthetic aperture radar: Frequency reported 2008, also transmits 2220.476 MHz
2296.500
Yaogan 6
2009-021A
34839
CW carrier (+sidebands?) Digital imaging for remote sensing, government/military use: Frequency reported 2008, also transmits 2280.716 MHz
2280.716
Yaogan 6
2009-021A
34839
CW carrier (+sidebands?) Digital imaging for remote sensing, government/military use: Weak, also reported at 2296.500 MHz
2216.527
Yaogan 7
2009-069A
36110
CW Carrier + sidebands Optical remote sensing - military or government: -
2266.319
Yaogan 8
2009-072A
36121
Weak CW Remote sensing: -
179.951
Ziyuan
2-01
2000-050A
26481
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz Remote Sensing: Coherent transmission at 479.865 MHz. No longer transmitting.
479.865
Ziyuan
2-01
2000-050A
26481
CW - Doppler tracking beacon Remote Sensing: Coherent transmission at at 179.951 MHz. No longer transmitting.
2207.500
Ziyuan
2-03
2004-044A
28470
CW carrier + sidebands Military reconnaissance: Frequency reported 2008, also transmits at 2220.5 MHz
2220.500
Ziyuan
2-03
2004-044A
28470
CW carrier + sidebands Military reconnaissance: Frequency reported 2008, also transmits at 2207.5 MHz
2285.525
ZP 1A2
2010-047C
37167
Weak CW Microelectronics studies: -
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