If you are interested in tracking satellites by radio, this frequency list should prove useful. It includes satellites and spacecraft tracked from the Zarya home location, with additional tracking information from other observers that is credited appropriately. Some of the frequencies have been used by past satellites but generally only transmissions logged since the year 2000 are listed here. An exception is the listing of some historic frequencies.
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 radio web sites and more-general military radio sites.
Where a satellite name is shown as "Object xxxx", it refers to the pseudo calalogue number listed in Mike McCants's "classified.tle" file. The incidence of these is becoming less as more satellites are becoming identified through radio and optical tracking.
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.
Zarya is located at Lincoln, UK: 53°.2233 North, 0°.6004 West.
| Freq (MHz) |
Satellite |
Payload |
Signal Type |
Notes |
| 121.750 |
Progress M-42
(Progress 7K-TGM No 242)
1999-038A
25858 |
Mir/ISS Logistics |
Ranging pulses |
Used by TORU remote control docking system as the return signal path to ISS (see also 130.167 MHz for the ISS transmission) - Also transmits at 166 MHz and 922.763 MHz |
| 121.750 |
Progress M1-2
(Progress M1 No252)
2000-021A
26301 |
Mir/ISS Logistics |
Ranging pulses |
Used by TORU remote control docking system as the return signal path to ISS (see also 130.167 MHz for the ISS transmission) - Also transmits at 166 MHz and 922.763 MHz |
| 121.750 |
Soyuz TMA-1
(Soyuz 11F732 No211)
2002-050A
27552 |
ISS Crew transport |
Medium bandwidth FM voice |
Frequency used during on-orbit operations to and from the Space Station, and reportedly used for recovery beacon during landing module descent - Also transmits at 166 MHz and 922.763 MHz |
| 130.167 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
Medium bandwidth FM voice |
VHF-2 channel used as an alternative to VHF-1 (143.625 MHz) during Shuttle/ISS on-orbit operations |
| 130.167 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
Ranging pulses |
Used by TORU remote control docking system, usually tested 1-2 days before a Progress docking is due, the Progress return path is at 121.750 MHz |
| 136.235 |
Tiros 10
1965-051A
1430 |
Meteorology |
AM - 1.3 kHz tone |
Payload now inactive, radio transmission is not continuous - (information contributed by Michael D Kenny) |
| 136.260 |
ERS 20
(OV5-3)
1967-040D
2768 |
USAF test satellite |
AM - tone (unstable) |
High orbit, visible for long periods of time - (information contributed by Michael D Kenny) |
| 136.410 |
Isis 1
1969-009A
3669 |
Ionosphere studies |
CW |
(information contributed by Michael D Kenny) |
| 136.440 |
ERS 15
(NORAD lists as Secor 7)
1966-077C
2412 |
Military satellite |
AM with 1.3 kHz tone |
Incorrectly catalogued by NORAD as SECOR 7 - (information contributed by Michael D Kenny) |
| 136.500 |
Nimbus 4
(Nimbus D)
1970-025A
4362 |
Meteorology (including imaging) |
CW - sometimes modulated |
Payload no longer operational - (information contributed by Michael D Kenny) |
| 136.650 |
NNS O-2
(Oscar O-2)
1964-083D
965 |
Navigation |
CW Carrier plus telemetry tones |
Second operational TRANSIT navsat, navigation system failed soon after launch but transmitter is still active (information contributed by Michael D Kenny) |
| 136.695 |
Shinsei
(MS-F2)
1971-080A
5485 |
Japanese scientific satellite |
CW |
Continuous transmission - (information contributed by Michael D Kenny) |
| 136.770 |
NOAA 9
(NOAA F)
1984-123A
15427 |
Formerly meteorological imaging |
CW |
Telemetry frequency, transmission is intermittent - (information contributed by Michael D Kenny) - Also has a transmission at 137.500 MHz |
| 136.800 |
Solrad 7B
(SR 7B)
1965-016D
1291 |
Solar radiation studies (launched 1969) |
AM IRIG telemetry channels |
Continuous transmission - (information contributed by Michael D Kenny) |
| 137.080 |
OPS 7898-2
(NOSS B1?)
1971-110C
5680 |
US military satellite |
CW |
(information contributed by Michael D Kenny) |
| 137.100 |
NOAA 18
(NOAA N)
2005-018A
28654 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Revised frequency as of 2006 Jan 4, changed from 137.9125 MHz |
| 137.142 |
Eutelsat I F4
(ECS 4)
1987-078B
18351 |
Defunct comsat |
CW |
Regular, intermittent signal possibly due to vehicle rotation causing periodic flow of power from solar panels |
| 137.200 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.225 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.250 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies,individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.300 |
Russian Imaging |
Meteorological imaging |
APT at 2 lines per second |
Frequency not currently active |
| 137.350 |
NOAA 15
(NOAA K)
1998-030A
25338 |
Meteorological imaging |
CW Doppler Beacon and telemetry |
Continuous transmission -(information contributed by Michael D Kenny) - Also transmits at 137.500 MHz |
| 137.350 |
NOAA 16
(NOAA L)
2000-055A
26536 |
Formerly meteorological imaging |
CW Doppler Beacon and telemetry |
Continuous transmission -(information contributed by Michael D Kenny) - Also transmits at 137.500 MHz |
| 137.350 |
Compass 2
2006-019A
29157 |
Russian scientific satellite studying possible ways of predicting earthquakes - not operating properly |
CW/AM |
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 |
| 137.380 |
OPS 7613-1
(NRL PL176)
1969-082B
4256 |
Navigation technology |
Mixed modulation (PAM/FM/AM) |
(information contributed by Michael D Kenny) |
| 137.400 |
Russian Imaging |
Meteorological imaging |
APT at 2 lines per second |
Frequency not currently active |
| 137.410 |
OPS 7613-6
(NOSS A1?)
1969-082E
4237 |
USAF test satellite |
CW |
(information contributed by Michael D Kenny) |
| 137.440 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies, individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.460 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies, individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.500 |
Tiros-N
1978-096A
11060 |
Meteorological imaging |
CW - carrier only |
Inactive satellite but reportedly transmitting |
| 137.500 |
NOAA 6
(NOAA A)
1979-057A
11416 |
Meteorological imaging |
CW - carrier only |
Inactive satellite but reportedly transmitting |
| 137.500 |
NOAA 9
(NOAA F)
1984-123A
15427 |
Formerly meteorological imaging |
Tone for 6 seconds out of every 25 seconds (periods vary - these are averages) |
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 |
| 137.500 |
NOAA 12
(NOAA D)
1991-032A
21263 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Switched off occasionally when transmissions conflict with those from NOAA 15 - Also transmits at 137.770 MHz - De-commissioned 2007 Aug 10 |
| 137.500 |
NOAA 15
(NOAA K)
1998-030A
25338 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Switched off occasionally when transmissions conflict with those from NOAA 12 - Also transmits at 137.350 MHz |
| 137.625 |
NOAA 14
(NOAA 14)
1994-089A
23455 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Switched off occasionally when transmissions conflict with those from NOAA 17 - Also transmits at 137.770 MHz - Decommissioned 2007 May 23 |
| 137.625 |
NOAA 17
(NOAA M)
2002-032A
27453 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Switched off occasionally when transmissions conflict with those from NOAA 14 |
| 137.663 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.688 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.713 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.738 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.770 |
NOAA 11
(NOAA H)
1988-089A
19531 |
Formerly meteorological imaging |
CW Doppler Beacon and telemetry |
Continuous transmission when operational - (information contributed by Michael D Kenny) - De-commissioned 2004 June 16 |
| 137.770 |
NOAA 12
(NOAA D)
1991-032A
21263 |
Meteorological imaging |
CW Doppler Beacon and telemetry |
Also transmitted at 137.500 MHz - De-commissioned 2007 Aug 10 |
| 137.770 |
NOAA 14
(NOAA 14)
1994-089A
23455 |
Meteorological imaging |
CW Doppler Beacon and telemetry |
Also transmits at 137.625 MHz - Decommissioned 2007 May 23 |
| 137.770 |
NOAA 17
(NOAA M)
2002-032A
27453 |
Meteorological imaging |
CW Doppler Beacon and telemetry |
Also transmits at 137.625 MHz |
| 137.800 |
Orbcomm |
Mobile telephony |
Digitised telephone traffic |
One of several frequencies - individual satellites switch between them - Also transmits at 400.100 MHz |
| 137.850 |
Russian Imaging |
Meteorological imaging |
APT at 2 lines per second |
Frequency not currently active |
| 137.913 |
NOAA 18
(NOAA N)
2005-018A
28654 |
Meteorological imaging |
APT at 4 lines per second - interlaced visible light and infrared images |
Frequency probably not active - changed to 137.100 MHz (2006 Jan 4?) |
| 143.625 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
Medium bandwidth FM voice |
VHF-1 channel, also used to relay Mission Control to the Shuttle - used as part of the ISS Early Communications System over the USA working with the Wallops Facility and White Sands, detected carrying packet data transmissions during Expedition 1 |
| 145.800 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
Amateur Radio downlink frequency |
Amateur radio downlink - see NASA's ARISS Page |
| 145.825 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
Amateur Radio downlink frequency |
Amateur radio downlink - see NASA's ARISS Page |
| 145.990 |
Suitsat
(Orlan-M No14)
2005-035C
28933 |
Amateur radio experiment - life expired Orlan spacesuit equipped with a radio transmitter and released from ISS during a crew EVA |
NFM - extremely weak |
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 |
| 149.910 |
Cosmos 2341
(Parus)
1997-017A
24772 |
Comms |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Transmission contains an almanac for all active satellites in the constellation - Use for navigation has probably ceased but is still supporting whatever other system requires reasonably precise positional information for the satellites - Coherent transmission at 399.920 MHz |
| 149.910 |
Cosmos 2398
(Parus)
2003-023A
27818 |
Comms |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Transmission contains an almanac for all active satellites in the constellation - Use for navigation has probably ceased but is still supporting whatever other system requires reasonably precise positional information for the satellites - Coherent transmission at 399.760 MHz |
| 149.940 |
Cosmos 2378
(Parus)
2001-023A
26818 |
Comms |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Transmission contains an almanac for all active satellites in the constellation - Use for navigation has probably ceased but is still supporting whatever other system requires reasonably precise positional information for the satellites - Coherent transmission at 399.840 MHz |
| 149.970 |
Cosmos 2336
(Parus)
1996-071A
24677 |
Comms |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Transmission contains an almanac for all active satellites in the constellation - Use for navigation has probably ceased but is still supporting whatever other system requires reasonably precise positional information for the satellites - Coherent transmission at 399.840 MHz |
| 149.970 |
Cosmos 2389
(Parus)
2002-026A
27436 |
Comms |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Transmission contains an almanac for all active satellites in the constellation - Use for navigation has probably ceased but is still supporting whatever other system requires reasonably precise positional information for the satellites - Coherent transmission at 399.920 MHz |
| 149.979 |
Oscar 29
(Transit/NIMS)
1987-080B
18362 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
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 |
| 149.979 |
Oscar 31
(Transit/NIMS)
1988-074B
19420 |
Ionospheric modelling for US military (NIMS) |
FM telemetry (tones) +/- 2.4 kHz from carrier |
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) |
| 149.988 |
Oscar 27
(Transit/NIMS)
1987-080A
18361 |
Ionospheric modelling for US military (NIMS) |
FM telemetry (tones) +/- 2.4 kHz from carrier |
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 |
| 149.988 |
Oscar 23
(Transit/NIMS)
1988-033A
19070 |
Ionospheric modelling for US military (NIMS) |
FM telemetry (tones) +/- 2.4 kHz from carrier |
Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one) |
| 149.988 |
Oscar 32
(Transit/NIMS)
1988-033B
19071 |
Ionospheric modelling for US military (NIMS) |
FM telemetry (tones) +/- 2.4 kHz from carrier |
Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one) |
| 149.988 |
Oscar 25
(Transit/NIMS)
1988-074A
19419 |
Ionospheric modelling for US military (NIMS) |
FM telemetry (tones) +/- 2.4 kHz from carrier |
Operational frequency - Coherent transmission at 399.968 MHz - Occasionally changes between this frequency and the maintenance one) |
| 150.000 |
Nadezhda |
Navigation - plus Search and Rescue monitoring |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Several satellites - the system is no longer operational, has been silent since 2003 November 26 - Coherent transmission at 400.000 MHz |
| 150.000 |
Tsikada |
Navigation - plus Search and Rescue monitoring |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Several satellites - the system is no longer operational, has been silent since 2003 November 26 - Coherent transmission at 400.000 MHz |
| 150.012 |
Unknown |
Not known |
'Wandering' CW |
Satellite in GEO, possibly graveyard orbit, also transmits 400.032 MHz |
| 150.012 |
Geosat
1985-021A
15595 |
Oceanography - wave height measurement |
CW - Doppler tracking beacon |
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 |
| 150.012 |
RADCAL
(STEP P92-1)
1993-041A
22698 |
Radar calibration |
CW - Doppler tracking beacon |
Radar Calibration satellite - Coherent transmission at 400.032 MHz, operation is intermittent |
| 150.012 |
GFO
1998-007A
25157 |
Oceanography - wave height measurement |
CW - Doppler tracking beacon |
Geosat Follow On satellite - Coherent transmission at 400.032 MHz and also transmitted at 2207.5 MHz. Ceased to transmit 2208 November. |
| 150.012 |
ARGOS
(STEP P91-1)
1999-008A
25634 |
USAF space experiments |
CW - Doppler tracking beacon |
Coherent transmission at 400.032 MHz - Ceased to transmit 2003 |
| 150.012 |
USA 147
(DMSP F-15)
1999-067A
25991 |
RADCAL secondary payload aboard US military metsat |
CW - Doppler tracking beacon |
Defense Meteorological Satellite Program - Also transmits at 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 |
| 150.012 |
Picosat 9
(STEP P97-1)
2001-043B
26930 |
USAF Space Test Program (STEP) |
CW - Doppler tracking beacon |
Coherent transmission at 400.032 MHz - Ceased to transmit late-2004 |
| 150.030 |
Cosmos 2361
(Parus)
1998-076A
25590 |
Navigation (+ comms?) |
FM time and position information - sidebands at 3 kHz, 5 kHz and 7 kHz |
Coherent transmission at 400.080 MHz |
| 150.300 |
Cosmos 2373
(Yantar-1KFT11Ф660 №20, Kometa)
2000-058A
26552 |
Yantar/Cometa' recoverable satellite - photographic mapping |
AM telemetry - wide bandwidth |
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 |
| 150.300 |
Cosmos 2415
(Yantar-1KFT11Ф660 №21, Kometa)
2005-034A
28841 |
Yantar/Cometa' recoverable satellite - wide-area photographic reconnaissance |
CW - Doppler tracking beacon |
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 |
| 166.000 |
Progress M-42
(Progress 7K-TGM No 242)
1999-038A
25858 |
Mir/ISS Logistics |
FM telemetry - sidebands at +/- 128 kHz |
Transmits during on-orbit operations to and from the ISS, and while docked with the space station - The transmission sounds as a loud buzz with sharp peaks at the sideband frequencies - Also transmits at 922.763 MHz |
| 166.000 |
Progress M1-2
(Progress M1 No252)
2000-021A
26301 |
Mir/ISS Logistics |
FM telemetry - sidebands at +/- 128 kHz |
Transmits during on-orbit operations to and from the ISS, and while docked with the space station - The transmission sounds as a loud buzz with sharp peaks at the sideband frequencies - Also transmits at 922.763 MHz |
| 166.000 |
Soyuz TMA-1
(Soyuz 11F732 No211)
2002-050A
27552 |
ISS Crew transport |
FM telemetry - sidebands at +/- 128 kHz |
Transmits during on-orbit operations to and from the ISS, and while docked with the space station - The transmission sounds as a loud buzz with sharp peaks at the sideband frequencies - Also transmits at 121.750 MHz and 922.763 MHz |
| 179.951 |
Zi Yuan 2
(Jiang Bing 3A)
2000-050A
26481 |
Remote Sensing |
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz |
Coherent transmission at 479.865 MHz |
| 180.006 |
Fengyun 1C
1999-025A
25730 |
Meteorological imaging |
CW carrier on centre frequency plus telemetry sidebands at +/- 5 kHz- and further carriers at +/- 10 kHz |
Active transmitter until 2007 February when attacked in ground-based interceptor test - Coherent transmission at 480.017 MHz |
| 180.007 |
Fengyun 1D
2002-024B
27431 |
Meteorological Imaging |
CW carrier on centre frequency plus telemetry sidebands at +/- 5 kHz- and further carriers at +/- 10 kHz |
Coherent transmission at 480.017 MHz |
| 180.011 |
CBERS 1
1999-057A
25940 |
Remote sensing |
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz - and further carriers at +/- 40 kHz |
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 |
| 180.013 |
CBERS 2B
2007-042A
32062 |
Remote sensing |
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz |
China Brazil Earth Resources Satellite - Coherent transmission at 480.033 MHz, also transmits 2204.400 MHz |
| 180.014 |
CBERS 2
2003-049A
28057 |
Remote sensing |
CW carrier on centre frequency plus telemetry sidebands at +/- 20 kHz- and further carriers at +/- 40 kHz |
China Brazil Earth Resources Satellite - Coherent transmission at 480.037 MHz, ceased to transmit 2007 |
| 243.695 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 1 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.695 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 1 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.705 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 2 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.705 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 2 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.710 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 3 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.710 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 3 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.715 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 4 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.715 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 4 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.720 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 5 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.720 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 5 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.725 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 6 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.725 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 6 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.730 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 7 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.730 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 7 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.735 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 8 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.735 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 8 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.740 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
Channel usually occupied by an unmodulated carrier |
AFSATCOM Channel 9 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.740 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
Channel usually occupied by an unmodulated carrier |
AFSATCOM Channel 9 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.745 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 10 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.745 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 10 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.750 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 11 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.750 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 11 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.760 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 12 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - 2007 Oct 15, USA-125 ceased to transmit AFSATCOM |
| 243.760 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
Military quick reaction comms |
CW - RTTY-style data |
AFSATCOM Channel 12 transmission - 2005-2007, USA-137 and USA-125 were providing alternating coverage of the northern hemisphere from HEO - Second transmission frequency at 2242.50 MHz - Early in 2007, USA-137 ceased to transmit AFSATCOM but it was back on air early 2008 |
| 243.825 |
USA 99
(Milstar 1)
1994-009A
22988 |
USA Military communications from geosynchronous orbit |
Spread spectrum signal - +/- 64 kHz from centre frequency |
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! |
| 244.512 |
Cosmos 2353
(Strela-3)
1998-036B
25364 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2385
(Strela-3)
2001-058B
27056 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Gonets D1-8
(Strela-3)
2001-058E
27059 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - this is a Strela 3, NORAD has switched the identities of a Strela-3 and a Gonets from the same launch vehicle - entry updated 2009 Mar 8 |
| 244.512 |
Cosmos 2390
(Strela-3)
2002-036A
27464 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2391
(Strela-3)
2002-036B
27465 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2400
(Strela-3)
2003-037A
27868 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2401
(Strela-3)
2003-037B
27869 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2437
(Strela-3)
2008-025B
32954 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2438
(Strela-3)
2008-025C
32955 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - entry updated Mar 8 |
| 244.512 |
Cosmos 2439
(Strela-3)
2008-025D
32956 |
Store-dump comms (military) |
FM - mutiple sideband, 0.5s trigger signal every minute |
Trigger pulse for ground-based transmitters, received messages are re-transmitted at 261.035 - noted 2009 early March but not active mid-July |
| 250.075 |
USA 162
(SDS-3 F2)
2001-046A
26948 |
US intelligence-related satellite near 144° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 250.150 |
USA 76
(NOSS 2-2)
1991-076D
21808 |
US Military ocean surveillance |
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 |
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) |
| 250.158 |
USA 122
(NOSS 2-3)
1996-029D
23862 |
US Military ocean surveillance |
AM - 4.8 kHz data tone |
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) |
| 251.275 |
USA 198
(SDS-3 F4)
2007-060A
32378 |
US intelligence-related satellite - possibly including communications |
AM - 4.8 kHz data tone plus various test modes |
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 258.800 MHz, plus transmitter at 2242.50 MHz |
| 251.325 |
USA 155
(SDS-3 F1)
2000-080A
26635 |
US intelligence-related satellite near 10° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 251.700 |
USA 179
(SDS-3 F3)
2004-034A
28384 |
US intelligence-related satellite, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 251.700 |
USA 198
(SDS-3 F4)
2007-060A
32378 |
US intelligence-related satellite, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 252.675 |
USA 155
(SDS-3 F1)
2000-080A
26635 |
US intelligence-related satellite near 10° west longitude, possibly including communications |
AM - high speed (19.2 kb/s?) data transmission |
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 |
| 256.375 |
USA 179
(SDS-3 F3)
2004-034A
28384 |
US intelligence-related satellite - possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 256.375 |
USA 198
(SDS-3 F4)
2007-060A
32378 |
US intelligence-related satellite - possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 256.475 |
USA 162
(SDS-3 F2)
2001-046A
26948 |
US intelligence-related satellite near 144° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 258.150 |
USA 81
(Singleton 3)
1992-023A
21949 |
Electronic Intelligence Gathering similar to USA-32 |
AM - data plus modulated tones at 4.8 and 9.6 kHz |
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 |
| 258.775 |
USA 155
(SDS-3 F1)
2000-080A
26635 |
US intelligence-related satellite near 10° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 258.800 |
USA 198
(SDS-3 F4)
2007-060A
32378 |
US intelligence-related satellite - possibly including communications |
AM - 4.8 kHz data tone plus various test modes |
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 |
| 259.700 |
STS |
ISS Crew/payload transport |
AM voice |
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 transmits at 2217.500 MHz |
| 261.035 |
Cosmos 2439
(Strela-3)
2008-025D
32956 |
Store-dump comms (military) |
FM - mutiple sideband, data bursts of up to 40s at irregular intervals, mainly when overhead Russia |
Data burst is probably a reaction to an uplink message, also transmits at 244.512 MHz - entry updated 2009 Mar 8 |
| 263.225 |
USA 162
(SDS-3 F2)
2001-046A
26948 |
US intelligence-related satellite near 144° west longitude, possibly including communications |
AM - high speed (19.2 kb/s?) data transmission |
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 |
| 265.137 |
Gonets D1-3
(Gonets-D1)
1996-009C
23789 |
Store-dump comms |
FM - mutiple sideband, 0.5s trigger signal every minute plus occasional data bursts |
Has been reported on other frequencies in the past - entry updated 2009 Mar 13 |
| 267.550 |
USA 162
(SDS-3 F2)
2001-046A
26948 |
US intelligence-related satellite near 144° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 268.675 |
USA 155
(SDS-3 F1)
2000-080A
26635 |
US intelligence-related satellite near 10° west longitude, possibly including communications |
AM - 4.8 kHz data tone |
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 |
| 399.760 |
Cosmos 2341
(Parus)
1997-017A
24772 |
Comms |
CW - Doppler tracking beacon |
Coherent transmission at 149.910 MHz |
| 399.760 |
Cosmos 2398
(Parus)
2003-023A
27818 |
Comms |
CW - Doppler tracking beacon |
Coherent transmission at 149.910 MHz |
| 399.840 |
Cosmos 2378
(Parus)
2001-023A
26818 |
Comms |
CW - Doppler tracking beacon |
Coherent transmisiion at 149.940 MHz |
| 399.840 |
Cosmos 2389
(Parus)
2002-026A
27436 |
Comms |
CW - Doppler tracking beacon |
Coherent transmisiion at 149.940 MHz |
| 399.920 |
Cosmos 2336
(Parus)
1996-071A
24677 |
Navigation |
CW - Doppler tracking beacon |
Coherent transmission at 149.970 MHz |
| 399.944 |
Oscar 29
(Transit/NIMS)
1987-080B
18362 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
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 |
| 399.944 |
Oscar 31
(Transit/NIMS)
1988-074B
19420 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
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) |
| 399.968 |
Oscar 27
(Transit/NIMS)
1987-080A
18361 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
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 |
| 399.968 |
Oscar 23
(Transit/NIMS)
1988-033A
19070 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one) |
| 399.968 |
Oscar 32
(Transit/NIMS)
1988-033B
19071 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one) |
| 399.968 |
Oscar 25
(Transit/NIMS)
1988-074A
19419 |
Ionospheric modelling for US military (NIMS) |
Modulated CW carrier |
Operational frequency - Coherent transmission at 149.988 MHz (known to change between this frequency and the maintenance one) |
| 400.000 |
Nadezhda |
Navigation - plus Search and Rescue monitoring |
CW - Doppler tracking beacon |
Coherent transmission at 150.000 MHz - no longer active (see 150 MHz note) |
| 400.000 |
Tsikada |
Navigation - plus Search and Rescue monitoring |
CW - Doppler tracking beacon |
Coherent transmission at 150.000 MHz - no longer active (see 150 MHz note) |
| 400.032 |
Unknown |
Not known |
'Wandering' CW |
Satellite in GEO, possibly graveyard orbit, also transmits 150.012 MHz |
| 400.032 |
Geosat
1985-021A
15595 |
Oceanography - wave height measurement |
CW - Doppler tracking beacon |
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 |
| 400.032 |
RADCAL
(STEP P92-1)
1993-041A
22698 |
Radar calibration |
CW - Doppler tracking beacon |
Radar Calibration satellite - Coherent transmission at 150.012 MHz, operation is intermittent |
| 400.032 |
GFO
1998-007A
25157 |
Oceanography - wave height measurement |
CW - Doppler tracking beacon |
Geosat Follow On - Coherent transmission at 150.012 MHz and also transmittedat 2207.5 MHz. Ceased to transmit 2208 November. |
| 400.032 |
ARGOS
(STEP P91-1)
1999-008A
25634 |
USAF space experiments |
CW - Doppler tracking beacon |
Coherent transmission at 150.012 MHz - Ceased to transmit 2003 |
| 400.032 |
USA 147
(DMSP F-15)
1999-067A
25991 |
RADCAL secondary payload aboard US military metsat |
CW - Doppler tracking beacon |
Defense Meteorological Satellite Program - also transmits at 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 . |
| 400.032 |
Picosat 9
(STEP P97-1)
2001-043B
26930 |
USAF Space Test Program (STEP) |
CW - Doppler tracking beacon |
Detected being switched on and off over Europe, not continuously active - Coherent transmission at 150.012 MHz - Ceased to transmit late-2004 |
| 400.080 |
Cosmos 2361
(Parus)
1998-076A
25590 |
Navigation |
CW - Doppler tracking beacon |
Non operational but still transmitting 2000 December 13 - Coherent transmission at 150.030 MHz |
| 400.100 |
Orbcomm |
Mobile telephony |
CW - Doppler tracking beacon |
Several satellites - Also transmitting digitised telephony signals at various frequencies 137-138 MHz (see individual entries) |
| 400.450 |
Akebono
(EXOS-D)
1989-016A
19822 |
Studies of Magnetosphere and Ionosphere - Japan |
CW modulated |
Carrier with data modulation - appears as a tone modulated by a buzz |
| 400.550 |
Resurs-O1
(#4L)
1998-043A
25394 |
Remote sensing |
CW Spread Spectrum |
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 |
| 400.552 |
Munin
2000-075C
26621 |
Auroral research - Sweden |
AM - modem-type databursts |
Telemetry but silent since 2001 Feb 12 (shortly after launch) probably due to onboard computer failure - no longer active |
| 400.800 |
Cosmos 2373
(Yantar-1KFT11Ф660 №20, Kometa)
2000-058A
26552 |
'Yantar/Cometa' recoverable satellite - photographic mapping |
CW - Doppler tracking beacon |
Coherent transmission at 150.300 MHz - Cameras and film recovered after mission running between 2000 September 29 and 2000 November 14 - no longer active |
| 400.800 |
Cosmos 2415
(Yantar-1KFT11Ф660 №21, Kometa)
2005-034A
28841 |
Yantar/Cometa' recoverable satellite - wide-area photographic reconnaissance |
CW - Doppler tracking beacon |
Coherent transmission at 150.300 MHz - Cameras and film recovered after mission running between 2005 September 2 and 2005 October 14? - no longer active |
| 479.865 |
Zi Yuan 2
(Jiang Bing 3A)
2000-050A
26481 |
Remote sensing |
CW - Doppler tracking beacon |
Coherent transmission at at 179.951 MHz |
| 480.017 |
Fengyun 1D
2002-024B
27431 |
Meteorological Imaging |
CW - Doppler tracking beacon |
Coherent transmission at 180.007 MHz |
| 480.019 |
Fengyun 1C
1999-025A
25730 |
Remote sensing |
CW - Doppler tracking beacon |
Active transmitter until 2007 February when attacked in ground-based interceptor test - Coherent transmission at 180.007 MHz |
| 480.025 |
CBERS 1
1999-057A
25940 |
Remote sensing |
CW - Doppler tracking beacon |
China Brasil Earth Resources Satellite - Coherent transmission at 180.011 MHz - silent since mid-2003 |
| 480.033 |
CBERS 2B
2007-042A
32062 |
Remote sensing |
CW - Doppler tracking beacon |
China Brazil Earth Resources Satellite - Coherent transmission at 180.013 MHz, also transmits at 2204.400 MHz |
| 480.037 |
CBERS 2
2003-049A
28057 |
Remote sensing |
CW - Doppler tracking beacon |
China Brazil Earth Resources Satellite - Coherent transmission at 180.014 MHz, ceased to transmit 2007 |
| 628.000 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
FM telemetry - sidebands at +/- 128 kHz |
Transmits on command from within Russia - 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
(International Space Station)
1998-067A
25544 |
Space Station |
FM telemetry - sidebands at +/- 128 kHz |
Transmits on command from within Russia - 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
(International Space Station)
1998-067A
25544 |
Space Station |
FM telemetry - sidebands at +/- 128 kHz |
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 |
| 634.000 |
ISS
(International Space Station)
1998-067A
25544 |
Space Station |
FM telemetry - sidebands at +/- 128 kHz |
Transmissions originally reported by Sven Grahn when Zarya first reached orbit - Transmits on command from Moscow, 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 |
| 922.763 |
Progress M-42
(Progress 7K-TGM No 242)
1999-038A
25858 |
Mir/ISS Logistics |
CW |
Part of the REGUL command and control system - there may be other elements of signal on sidebands around this frequency - Active during the approach and departure phases from the ISS and occasionally during checks while docked - Also transmits at 121.75 MHz and 166 MHz |
| 922.763 |
Progress M1-2
(Progress M1 No252)
2000-021A
26301 |
Mir/ISS Logistics |
CW |
Part of the REGUL command and control system - there may be other elements of signal on sidebands around this frequency - Active during the approach and departure phases from the ISS and occasionally during checks while docked - Also transmits at 121.75 MHz and 166 MHz |
| 922.763 |
Soyuz TMA-1
(Soyuz 11F732 No211)
2002-050A
27552 |
ISS crew transport |
CW |
Part of the REGUL command and control system - there may be other elements of signals on sidebands around this frequency - transmits during the approach and departure phases from the ISS and occasionally during checks while docked - Also transmits at 121.75 MHz and 166 MHz |
| 1018.500 |
Briz-M |
Space launcher |
CW carrier plus sidebands |
Final launch vehicle stage, also transmits 1020.5 MHz - first tracked by Sven Grahn |
| 1020.500 |
Briz-M |
Space launcher |
CW carrier plus sidebands |
Final launch vehicle stage, also transmits 1018.5 MHz - first tracked by Sven Grahn |
| 2202.000 |
Beidou 5
(Beidou 5 (2A))
2007-011A
31115 |
Navigation satellite |
Carrier plus multiple sidebands |
Probably no longer transmitting - initially tracked from Europe but line of sight lost as it approached the operational location near 140° east |
| 2202.447 |
Sicral
2001-005A
26694 |
Geosynchronous comsat at 16° east longitude |
CW carrier plus sub-carriers at 293kHz and 297 kHz |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2202.507 |
USA 32
(Singleton 1)
1988-078A
19460 |
Electronic Intelligence Gathering similar to USA-81 |
CW carrier plus side-bands |
Also transmits at 2282.503 MHz but transmissions at the two frequencies are not always simultaneous |
| 2202.530 |
USA 81
(Singleton 3)
1992-023A
21949 |
Electronic Intelligence Gathering similar to USA-32 |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner, also transmits at 2257.530 MHz, no longer active |
| 2205.328 |
Telecom 2D
1996-044B
24209 |
Geosynchronous comsat at 8° west longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2207.130 |
Telecom 2C
1995-067A
23730 |
Geosynchronous comsat at 3° east longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2207.487 |
GFO
1998-007A
25157 |
Oceanography - wave height measurement |
CW carrier plus side-bands |
Geosat Follow On - Also transmitted at 150.012 MHz and 400.032 MHz. Ceased to transmit 2208 November. |
| 2207.500 |
AMS 2
(DMSP 5D F-2)
1977-044A
10033 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Advanced Meteorological Satellite - Also transmits at 2237.5MHz and 2252.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2212.504 |
Coriolis
2003-001A
27640 |
Oceanographic and geomagnetic studies |
CW carrier plus side-bands |
Also transmits at 2222.528 MHz |
| 2217.500 |
STS |
ISS Crew/payload transport |
CW carrier plus side bands carrying data |
Integrated voice and data on SGLS Channel 4 - transmitter operates almost continuously while the payload bay doors are open, also transmits at 259.7 MHz |
| 2222.481 |
USA 172
(DMSP 5D-3 F-16)
2003-048A
28054 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Defense Meteorological Satellite Program - Also transmits at 2237.5 MHz and 2247.5 MHz |
| 2222.497 |
USA 191
(DMSP 5D-3 F-17)
2006-050A
29522 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Defense Meteorological Satellite Program - Also transmits at 2237.515 MHz and (according to observations by the late Ivan Artner) at 2249.415 MHz |
| 2222.500 |
USA 173 P/L 1
(NOSS 3-2 leader)
2003-054A
28095 |
Navy Ocean Surveillance System SIGINT |
CW carrier plus side-bands |
Navy Ocean Surveillance System - Also transmits at 2232.5 MHz. Frequency Information contributed by the late Ivan Artner |
| 2222.500 |
USA 181 P/L 1
(NOSS 3-3 leader)
2005-004A
28537 |
Navy Ocean Surveillance System SIGINT |
CW carrier plus side-bands |
Navy Ocean Surveillance System - also transmits at 2232.5 MHz and 2277.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2222.502 |
USA 69
(Lacrosse 2)
1991-017A
21147 |
Military radar reconnaissance satellite |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner |
| 2222.502 |
USA 133
(Lacrosse 3)
1997-064A
25017 |
Military radar reconnaissance satellite |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner |
| 2222.528 |
Coriolis
2003-001A
27640 |
Oceanographic and geomagnetic studies |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner, also transmits at 2212.504 MHz |
| 2224.065 |
Shenzhou 7
2008-047A
33386 |
Piloted spacecraft |
CW carrier plus side-bands |
PRC piloted spacecraft - frequency first detected during the Shenzhou 7 mission (2008 September) by Richard Flagg, Hawaii USA - transmission is probably continuous while in orbit |
| 2227.476 |
NATO 4B
1993-076A
22921 |
Geosynchronous comsat at 35° east longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2227.481 |
NATO 4A
1991-001A
21047 |
Miltary geosynchronous comsat at 18° west longitude |
PSK with sub-carrier, 1024 kHz |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2227.487 |
Skynet 4C
1990-079A
20776 |
Miltary geosynchronous comsat at 1° west longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2227.497 |
Skynet 4E
1999-009B
25639 |
Miltary geosynchronous comsat at 53° east longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2227.508 |
Skynet 4D
1998-002A
25134 |
Miltary geosynchronous comsat at 34° west longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2227.514 |
Skynet 4F
2001-005B
26695 |
UK miltary and government comsat at 6° east longitude |
CW carrier plus side-bands |
Geosynchronous orbit - |
| 2232.495 |
USA 118
(Mercury 2)
1996-026A
23855 |
Multi-tasking military satellite at 13° west longitude? |
CW carrier plus side-bands |
geosynchonous orbit - Frequency Information contributed by the late Ivan Artner |
| 2232.496 |
USA 105
(Mercury 1)
1994-054A
23223 |
Multi-tasking military satellite at 41° west longitude? |
CW carrier plus side-bands |
geosynchonous orbit - Frequency Information contributed by the late Ivan Artner |
| 2232.497 |
USA 159
(DSP F-21)
2001-033A
26880 |
Geosynchronous missile early warning at 70° east longitude |
FM wide-bandwidth data |
Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2232.498 |
USA 149
(DSP F-20)
2000-024A
26356 |
Geosynchronous missile early warning at 8°.5 east longitude |
FM wide-bandwidth data |
Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2232.498 |
USA 173 P/L 1
(NOSS 3-2 leader)
2003-054A
28095 |
Navy Ocean Surveillance System - ocean SIGINT |
CW carrier plus side-bands |
Transmission may be from 28097 (NOSS 3-2 follower). Also reported to transmit at 2222.5 MHz |
| 2232.500 |
USA 181 P/L 1
(NOSS 3-3 leader)
2005-004A
28537 |
Navy Ocean Surveillance System SIGINT |
CW carrier plus side-bands |
Transmission may be from 28541 (NOSS 3-3 follower), also reported to transmit at 2222.5 MHz and 2277.5 MHz - latter frequency Information contributed by the late Ivan Artner |
| 2232.511 |
USA 75
(DSP F-16)
1991-080B
21805 |
Geosynchronous missile early warning at 38° west longitude |
FM wide-bandwidth data |
Defense Support Program also transmits at 2237.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2232.517 |
USA 184
(Trumpet 4/NROL-22)
2006-027A
29249 |
US - military and intelligence |
CW carrier plus side-bands |
Also transmits at 2277.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2234.520 |
Chang'e 1
2007-051A
32273 |
Lunar orbiting satellite |
CW carrier plus data sidebands and secondary carriers - two modes - 2 MHz bandwidth and 256 kHz bandwidth |
Lunar probe built and launched by the Peoples' Republic of China, originally tracked in HEO and then followed to the Moon - easily detectable with simple equipment; since arrival at the Moon, Chang'e has been transmitting internittently on command from ground stations |
| 2237.480 |
USA 149
(DSP F-20)
2000-024A
26356 |
Geosynchronous missile early warning at 8°.5 east longitude |
PSK with sub-carrier, 1024 kHz |
Defense Support Program - Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2237.495 |
USA 142
(DSP F-19)
1999-017A
25669 |
Missile early warning |
CW carrier plus side-bands |
Defense Support Program, suffered mission failure, satellite stranded in geosynchronous transfer orbit - Frequency Information contributed by the late Ivan Artner |
| 2237.496 |
USA 75
(DSP F-16)
1991-080B
21805 |
Geosynchronous missile early warning at 38° west longitude |
CW carrier plus side-bands |
Defense Support Program - Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2237.499 |
USA 159
(DSP F-21)
2001-033A
26880 |
Geosynchronous missile early warning at 70° east longitude |
PSK with sub-carrier, 1024 kHz |
Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2237.500 |
AMS 2
(DMSP 5D F-2)
1977-044A
10033 |
Military meteorological satellite - unspecified secondary payloads |
CW - wide sweeping carrier |
Advanced Meteorological Satellite - Also transmits at 2207.5MHz and 2252.5 MHz |
| 2237.510 |
USA 172
(DMSP 5D-3 F-16)
2003-048A
28054 |
Military meteorological satellite - unspecified secondary payloads |
CW - wide sweeping carrier |
Defense Meteorological Satellite Program - Also transmits at 2222.473 MHz and 2247.415 MHz |
| 2237.515 |
USA 109
(DMSP 5D-2 F13)
1995-015A
23533 |
Military meteorological satellite - unspecified secondary payloads |
CW + side-bands |
Defense Meteorological Satellite Program |
| 2237.515 |
USA 191
(DMSP 5D-3 F-17)
2006-050A
29522 |
Military meteorological satellite - unspecified secondary payloads |
CW - wide sweeping carrier |
Defense Meteorological Satellite Program - Also transmits at 2222.5 MHz and 2247.415 MHz |
| 2237.517 |
USA 147
(DMSP F-15)
1999-067A
25991 |
Military meteorological satellite with secondary payloads (one is a pair of RADCAL transmitters) |
CW - wide sweeping carrier |
Defense Meteorological Satellite Program - Also transmits at 2252.5 MHz, 150.012 MHz and 400.032 MHz (the last two are the RADCAL frequencies) |
| 2237.518 |
DSP F7
(DSP 9)
1977-007A
9803 |
DSP - Missile early warning |
CW carrier plus side-bands |
Defunct satellite in geosynchronous 'graveyard' orbit - Frequency Information contributed by the late Ivan Artner |
| 2242.473 |
USA 172
(DMSP 5D-3 F-16)
2003-048A
28054 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Defense Meteorological Satellite Program - Also transmits at 2249.415 MHz and 2237.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2242.482 |
USA 129
(Improved Crystal/KH-12-3)
1996-072A
24680 |
US - military and intelligence |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner |
| 2242.482 |
USA 186
(KH-12-5/Crystal)
2005-042A
28888 |
US - military and intelligence |
CW carrier plus side-bands |
Possible transmission frequency - Frequency Information contributed by the late Ivan Artner |
| 2242.485 |
Unknown |
Not known |
CW (plus sidebands?) |
Satellite in LEO |
| 2242.486 |
USA 155
(SDS-3 F1)
2000-080A
26635 |
US intelligence-related satellite at 10° west longitude, possibly including communications |
PSK with sub-carrier, 1024 kHz |
Geosynchronous orbit, Frequency varies according to solar illumination and can occasionally be found as low as 2242.47 MHz - also transmits at 251.325 MHz, 252.675, 258.775 and 268.775 MHz |
| 2242.493 |
USA 8
(Magnum 1)
1985-010B
15543 |
Probably signals intelligence gathering, from geosynchronous orbit |
CW carrier plus side-bands |
Frequency information from Greg Roberts |
| 2242.495 |
USA 137
(SDS-2 F5)
1998-005A
25148 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier plus side-bands |
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 |
| 2242.496 |
USA 67
(SDS-2 F2)
1990-097B
20963 |
Multi-tasking military satellite near 75° east longitude |
PSK with sub-carrier, 1024 kHz |
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 |
| 2242.498 |
USA 125
(SDS-2 F4)
1996-038A
23945 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier plus side-bands |
Formerly part of the operational constellation of three SDS satellites in highly eccentric orbit (HEO) - Also transmits AFSATCOM signal near 243.7 MHz; the S-band transmission from USA-125, an SDS-2 satellite, is at a lower power than the SDS-3 satellites |
| 2242.500 |
USA 40
(SDS 2 F1/90020 )
1989-061B
20167 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier, oscillates in frequency due to satellite spinning at 5.2s per rev |
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 |
| 2242.500 |
USA 89
(SDS 2 F3)
1992-086B
22518 |
US mult--tasking intelligence-gathering and communications satellite, now deactivated |
CW carrier plus side-bands |
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 |
| 2242.500 |
USA 162
(SDS-3 F2)
2001-046A
26948 |
US intelligence-related satellite near 144° west longitude, possibly including communications |
CW carrier (plus side-bands?) |
Reported frequency for satellite in geosynchronous orbit - also reported to transmit at 250.075 MHz, 256.475, 263.225 and 267.550 MHz |
| 2242.503 |
USA 179
(SDS-3 F3)
2004-034A
28384 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier plus side-bands - strong |
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 |
| 2242.504 |
USA 198
(SDS-3 F4)
2007-060A
32378 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier plus side-bands - strong |
Part of a constellation of three satellites in highly eccentric orbit (HEO), lanched 2007 Dec 10 as a replacement for USA-125, the other satellites are USA-137 and USA-179, also transmits at 251.700 MHz and 256.375 MHz - was transmitting at 251.275 and 258.800 MHz during the orbital test phase up to 2008 Mar 13 |
| 2242.515 |
USA 21
(SDS-1 F6/90004)
1987-015A
17506 |
US mult--tasking intelligence-gathering and communications satellite |
CW carrier, oscillates in frequency due to satellite spinning at 4.6s per rev |
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 |
| 2242.517 |
ASTEX
(P71-2)
1971-089A
5560 |
Technology experiments |
Multiple sidebands - very small dispersion |
Old satellite detected as still transmitting during 2008 March |
| 2249.500 |
USA 193
(NROL-21)
2006-057A
29651 |
US intelligence-related satellite |
CW carrier plus side-bands |
Satellite failed soon after launch 2006 December - no longer transmitting Frequency Information contributed by the late Ivan Artner |
| 2252.490 |
USA 95
(UFO F- 2)
1993-056A
22787 |
Miltary geosynchronous comsat at 29° east longitude |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner |
| 2252.490 |
USA 146
(UFO F-10)
1999-063A
25967 |
Miltary geosynchronous comsat at 72° east longitude |
PSK with sub-carrier, 1.7 MHz |
Frequency Information contributed by the late Ivan Artner - co-located so this may be UFO-F11 |
| 2252.493 |
USA 127
(UFO F- 7)
1996-042A
23967 |
Miltary geosynchronous comsat at 22° west longitude |
PSK with sub-carrier, 1.7 MHz |
Frequency Information contributed by the late Ivan Artner |
| 2252.499 |
USA 147
(DMSP F-15)
1999-067A
25991 |
Military meteorological satellite with secondary payloads (one is a pair of RADCAL transmitters) |
CW carrier plus side-bands |
Defense Meteorological Satellite Program - Also transmits at 2237.5 MHz, 150.012 MHz and 400.032 MHz (the last two are the RADCAL frequencies) |
| 2252.500 |
AMS 2
(DMSP 5D F-2)
1977-044A
10033 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Advanced Meteorological Satellite - Also transmits at 2207.5 MHz and 2234.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2252.500 |
USA 109
(DMSP 5D-2 F13)
1995-015A
23533 |
Military meteorological satellite - unspecified secondary payloads |
CW carrier plus side-bands |
Defense Meteorological Satellite Program, - Frequency Information contributed by the late Ivan Artner |
| 2257.500 |
DSCS III F-1
(DSCS III A-1)
1982-106B
13637 |
USA DoD comsat |
CW carrier plus side-bands |
Possibly defunct, in geosynchronous drift orbit - Frequency Information contributed by the late Ivan Artner |
| 2257.508 |
USA 153
(DSCS III F-12)
2000-065A
26575 |
Miltary geosynchronous comsat at 12° west longitude |
PSK with sub-carrier, 1024 kHz |
Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2257.511 |
USA 167
(DSCS III F-13)
2003-008A
27691 |
Miltary geosynchronous comsat at 60° east longitude |
CW carrier plus side-bands |
Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2257.512 |
USA 97
(DSCS III F-8)
1993-074A
22915 |
Miltary geosynchronous comsat at 57° east longitude |
CW carrier plus side-bands |
Defense Satellite Communications System, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2257.530 |
USA 81
(Singleton 3)
1992-023A
21949 |
Electronic Intelligence Gathering similar to USA-32 |
CW carrier plus side-bands |
Also transmits at 2202.5 MHz (Frequency Information contributed by the late Ivan Artner) and 258.150 MHz, no longer active |
| 2262.493 |
USA 46
(FltSatCom F-8)
1989-077A
20253 |
Miltary geosynchronous comsat at 15°.5 west longitude |
PSK with sub-carrier, 1024 kHz |
Frequency Information contributed by the late Ivan Artner |
| 2262.499 |
USA 174
(UFO F-11)
2003-057A
28117 |
Miltary geosynchronous comsat at 72° east longitude |
PSK with sub-carrier, 1.7 MHz |
Frequency Information contributed by the late Ivan Artner - co-located so this may be UFO-F10 |
| 2262.507 |
USA 164
(Milstar 5)
2002-001A
27168 |
Miltary geosynchronous comsat at 28°.5 east longitude |
CW carrier plus side-bands |
Also transmits 2267.513 MHz, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2262.509 |
USA 99
(Milstar 1)
1994-009A
22988 |
Miltary geosynchronous comsat at 39° west longitude |
CW carrier plus side-bands |
Geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2263.600 |
Kaguya
(Selene)
2007-039A
32054 |
Lunar orbiting satellite |
CW Carrier plus side-bands |
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 |
| 2267.513 |
USA 164
(Milstar 5)
2002-001A
27168 |
Miltary geosynchronous comsat at 28°.5 east longitude |
CW carrier plus side-bands |
Occasional transmission - Also transmits 2262.507 MHz MHz, geosynchronous orbit - Frequency Information contributed by the late Ivan Artner |
| 2277.485 |
OPS 4029
(Vortex 3)
1981-107A
12930 |
Multi-tasking military satellite at 41° west longitude? |
CW carrier plus side-bands |
Geosynchronous orbit Frequency Information contributed by the late Ivan Artner |
| 2277.500 |
USA 78
(DSCS III F-5)
1992-006A
21873 |
USA DoD comsat |
CW carrier plus side-bands |
Defunct satellite in geostationary drift orbit - Frequency Information contributed by the late Ivan Artner |
| 2277.500 |
USA 105
(Mercury 1)
1994-054A
23223 |
Multi-tasking military satellite at 27°.5 west longitude |
CW carrier plus side-bands |
Frequency Information contributed by the late Ivan Artner |
| 2277.500 |
USA 160 P/L 1
(NOSS 3-1 leader)
2001-040A
26905 |
Navy Ocean Surveillance System - ocean SIGINT |
CW carrier plus side-bands |
Navy Ocean Surveillance System - Frequency Information contributed by the late Ivan Artner, also transmits at 2232.495 MHz |
| 2277.500 |
USA 181 P/L 1
(NOSS 3-3 leader)
2005-004A
28537 |
Navy Ocean Surveillance System SIGINT |
CW carrier plus side-bands |
Navy Ocean Surveillance System, also transmits at 2222.5 MHz and 2232.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2277.520 |
USA 184
(Trumpet 4/NROL-22)
2006-027A
29249 |
US intelligence-related satellite |
CW carrier plus side-bands |
Also transmits at 2232.5 MHz - Frequency Information contributed by the late Ivan Artner |
| 2282.500 |
MSX
1996-024A
23851 |
Experiments satellite |
AM - 1 kHz tone |
Midcourse Space Experiment, infrared sources with a view to improved design of missile detecting sensors - Frequency Information contributed by the late Ivan Artner |
| 2282.503 |
USA 32
(Singleton 1)
1988-078A
19460 |
Electronic Intelligence Gathering similar to USA-81 |
CW carrier plus side-bands |
Observed to switch on and off and does not transmit every rev - at least while over Europe, also transmits 2202.507 MHz but transmissions at the two frequencies are not always simultaneous |
| 2286.001 |
Cosmos 2422
(OKO)
2006-030A
29260 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2292.001 MHz, operates only above the northern hemisphere |
| 2292.001 |
Cosmos 2422
(OKO)
2006-030A
29260 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2298.001 MHz, operates only above the northern hemisphere |
| 2298.000 |
Cosmos 2388
(OKO)
2002-017A
27409 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmitted at at 2298.0 MHz - ceased to operate 2006 November |
| 2298.000 |
Cosmos 2393
(OKO)
2002-059A
27613 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmitted at 2286.0 MHz - ceased to operate 2007 March |
| 2298.000 |
Cosmos 2430
(Oko US-KS?)
2007-049A
32268 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2304.0 MHz, operates only above the northern hemisphere |
| 2298.000 |
Cosmos 2446
(73D6/US-KS/OKO)
2008-062A
33447 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2304.000 MHz, operates only above the northern hemisphere |
| 2304.000 |
Cosmos 2388
(OKO)
2002-017A
27409 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmitted at 2298.0 MHz - ceased to operate 2006 November |
| 2304.000 |
Cosmos 2393
(OKO)
2002-059A
27613 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmitted at 2286.0 MHz - ceased to operate 2007 March |
| 2304.000 |
Cosmos 2430
(Oko US-KS?)
2007-049A
32268 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2298.0 MHz, operates only above the northern hemisphere |
| 2304.000 |
Cosmos 2446
(73D6/US-KS/OKO)
2008-062A
33447 |
Missile early warning satellite |
CW carrier plus side-bands |
OKO satellite in highly eccentric orbit - Also transmits at 2298.000 MHz, operates only above the northern hemisphere |
