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ISS Frequencies

Amateur Radio Frequencies (Note: Only one mode active at a time)

FM VOICE for ITU Region 1: Europe-Middle East-Africa-North Asia

  • Downlink 145.800
  • Uplink 145.200

FM VOICE for ITU Region 2&3: North and South America-Caribbean-Greenland-Australia-South Asia

  • Downlink 145.800
  • Uplink 144.490

FM U/v VOICE Repeater (Worldwide)

  • Downlink 145.800
  • Uplink 437.800

FM V/u with PL VOICE Repeater (Worldwide)

  • Downlink 437.800
  • Uplink 145.990 with 67.0 PL

FM L/v VOICE Repeater (Worldwide)

  • Downlink 145.800
  • Uplink 1269.650

AX.25 1200 Bd AFSK Packet Radio (Worldwide)

  • Downlink 145.825
  • Uplink 145.825

FM SSTV downlink (Worldwide)

  • Downlink 145.800

UHF Simplex (rarely used)

  • Downlink 437.550
  • Uplink 437.550

Other Frequencies

121.125 FM
RS EVA from Orlan suit [Credit N5VHO]
121.75 FM
Downlink from Soyuz-TM (voice). RS EVA from Orlan suit. Soyuz VHF-2. Progress Telemetry. [Credit N5VHO]
130.167 AM
VHF-2 Downlink from Zarya (Service Module). RS EVA to Orlan suits [Credit N5VHO]
143.625 FM
VHF-1 downlink. Main Russian communications channel. Often active over Moskow. You can hear air to ground conversations in Russian. Sometimes English when US crews talk to their NASA representative in Star City. [Credit IZ6BYY]
166.000 AM
Soyuz-TM and Progress M-1 telemetry
This Frequency has not been confirmed yet. Please contribute and post your report as comment
632.000 634.000 AM
Zarya telemetry
This Frequency has not been confirmed yet. Please contribute and post your report as comment
628.000 630.000 AM
Zvezda telemetry
This Frequency has not been confirmed yet. Please contribute and post your report as comment
922.76 CW
Soyuz-TM and Progress M1 beacon
This Frequency has not been confirmed yet. Please contribute and post your report as comment
2265.0 Digital
Telementry Downlink
This Frequency has not been confirmed yet. Please contribute and post your report as comment
15003.4 Digital
Data downlink
This Frequency has not been confirmed yet. Please contribute and post your report as comment
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Russian VHF frequencies

N5VHO – January 24, 2008 – 19:14

I can confirm that Russia uses the following VHF downlink frequencies.
ISS VHF-1 - 143.625
ISS VHF-2 - 130.167
RS EVA to suit - 130.167
RS EVA from suits - 121.750 and 121.125
Soyuz VHF-2 - 121.750
Progress telem - 121.75

Kenneth - N5VHO
http://spaceflight.nasa.gov/station/reference/radio/
Support ARISS http://www.amsat-na.com/donation.php (select "Human Spaceflight (ARISS))

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121.750 and 121.125 MHz

zarya2 – February 15, 2008 – 01:45

Have you intercepted transmissions on all of these frequencies?

Also:

Is your "confirmation" based on reception on any of the frequencies you have listed?

For what is "RS" an abbreviation?

Are the EVA frequencies genuine "downlinks" to Mission control or are they space-to-space frequencies?

What, please, is the frequency of "Soyuz VHF-1"?

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My confirmation is a NASA

N5VHO – February 15, 2008 – 16:57

My confirmation is a NASA graphic outlining communications for ISS. I have also had most confirmed by reception.
"RS" is the abbreviation used by NASA to refer to Russia. "US" is used for United States.
The Russians use the EVA frequencies for communcitaion between the ISS and their suits. That communication is then relayed to the ground via various communication links. For example, RS EVA to suit - 130.167 means the frequency transmitted by ISS and received by the Orlan suit.
I have no listing for a VHF-1 for the Soyuz in my document.

Kenneth - N5VHO
http://spaceflight.nasa.gov/station/reference/radio/
Support ARISS http://www.amsat-na.com/donation.php (select "Human Spaceflight (ARISS))

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Reception

zarya2 – February 16, 2008 – 00:05

When you say "most confirmed by reception", which ones have you not received?

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Orlan Comms

N5VHO – February 16, 2008 – 13:22

Unfortunately, Russian EVA activities never seem to occur during orbits over Houston so I have not had the opportunity to listen to the suit frequencies. Since the other frequencies work, I have no reason to doubt the documentation at this time.

Kenneth - N5VHO
http://spaceflight.nasa.gov/station/reference/radio/
Support ARISS http://www.amsat-na.com/donation.php (select "Human Spaceflight (ARISS))

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130.167

ZS6TW – February 18, 2008 – 20:42

Hi,
The 130.167 freq is very reliable and super strong during EVA and Soyuz undoc ops.
I catch two or three orbits (but not the last) just before reentry of Soyuz.
Sometimes the crew is very quiet - very little said during a 10 minute pass.
Normaly all conversation in Russian.

I have not been able to detect sigs on 121 freqs during EVA.
Of course the TX will be very low power in any case, so my yagis built for 144.1 may be just too much of a dummy load at those fequencies. I will try other antenna next time to see....

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Orlan Comms

zarya2 – February 17, 2008 – 15:04

;-)

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RS is the abbreviation for

KA1RFD – February 15, 2008 – 08:24

RS is the abbreviation for Radio Sputnik...
73
Rod KA1RFD FN54

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