ISS Frequencies

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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]