ISS Frequencies Radio : Tracking of the International Space Station

Freq (MHz)	Satellite	Payload	Signal Type	Notes
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
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
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
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
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	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
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