Satellite and launch vehicle series tend to use frequencies repetitively so to see what might be coming up, there is a launch calendar that can be found in the Go For Launch! section (also available from the right hand menu).

NOTE: All frequencies based on observations from the Zarya location are Doppler corrected to give the true transmission frequency. Where another source gives a frequency near to, but different from, a frequency listed here, it is probably a received frequency which includes a Doppler shift.

Specifically excluded from being listed are amateur radio satellites, the US military VHF communications transponders near 250 MHz aboard geosynchronous satellites, and the plethora of transmitters near 435 MHz.

Identification of transmitting satellites for which SpaceTrack does not publish orbital elements is very dependent on the work of visual observers and people like Mike McCants who has spent the last 20 years computing orbital elements from the observations. Much of the effort is facilitated by the existence of the Seesat-L online visual satellite observing community - currently overseen gently by Ted Molczan, and Mike's published elements files.

That observational and analysis work is gratefully acknowledged and, whenever possible, I have tried to repay the effort by feeding back relevant observations from the radio side.

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.

Followers of the Zarya_Info Twitter feed will get updates when changes to the list occur.