Satellites & ISS
ISS amateur radio and satellites: ARISS frequencies, amateur satellites, Doppler calculator and pass maps. Cross-check predictions with AMSAT.
Amateur satellite passes and maps
Select ISS or another amateur radio satellite, then enter your grid to plot your position and estimated passes. Check AMSAT for frequencies and operational status.
Amateur satellite tracking maps
Select satellites and enter your Maidenhead grid. Your observer position appears on the world map. Pass times are approximate orbital estimates, not operational reports.
Natural Earth technical vector map showing continent outlines, not roads or satellite imagery.
CelesTrak AMATEUR orbital catalog; listing does not imply operational radio service. You can view up to 6 satellites at the same time.
World map, satellite and observer i
Colored markers and tracks show selected satellites. The lightly shaded dashed circles indicate approximate geometric horizon visibility at 0° elevation, not guaranteed radio coverage. The tiny orange dot is your observer position. Passes are approximate orbital estimates.
i
Colored markers and tracks show selected satellites. The lightly shaded dashed circles indicate approximate geometric horizon visibility at 0° elevation, not guaranteed radio coverage. The tiny orange dot is your observer position. Passes are approximate orbital estimates.Shaded area: estimated geometric visibility to the horizon (0°), not guaranteed radio coverage.
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Sky pass path i
Centre = zenith 90°, edge = horizon 0°. Elevation scale 0°, 30°, 60°, 90° and eight bearings; AOS start, MAX highest elevation, LOS end. NOW appears only for a pass in progress. Approximate orbital model, not SGP4.
i
Centre = zenith 90°, edge = horizon 0°. Elevation scale 0°, 30°, 60°, 90° and eight bearings; AOS start, MAX highest elevation, LOS end. NOW appears only for a pass in progress. Approximate orbital model, not SGP4.Enter your location to show your QTH and estimate passes.
Estimated passes over the next 24 hours
Enter your location to show your QTH and estimate passes.
Frequencies: check AMSAT for the latest information. Being listed is not proof of radio activity. AMSAT ↗
Approximate two-body + J2 orbital model, NOT SGP4. Predictions are not precise operating schedules; cross-check with AMSAT. Verify on AMSAT ↗
Your grid and coordinates remain in the browser. RadioMeteo fetches CelesTrak elements server-side with a shared cache of at least 2 hours.
Natural Earth cartography (public domain) · CelesTrak orbital data and amateur catalog · frequency reference AMSAT. Natural Earth · CelesTrak.
Reception basics
For ISS VHF reception an FM-capable receiver and a reasonably clear view of the sky may be enough. At 70 cm, consider Doppler correction and polarization. For other satellites, check the latest frequencies in the AMSAT database.
These frequencies are published by ARISS and do not imply a service is currently active. A predicted pass does not imply a radio transmission. The Doppler calculator requires a manually entered radial velocity.
Sources and updates: ARISS, AMSAT, IARU. Sources reviewed 15 October 2026. Opens on the provider website.
Doppler calculator
Calculate the theoretical received frequency using a frequency and a radial velocity you enter. No live orbital data or GPS tracking.
Nonrelativistic approximation: fᵣ ≈ f₀ × (1 − vᵣ/c), c = 299,792.458 km/s. Positive means receding.
ISS amateur radio frequencies
ARISS references for preparing reception and contacts. Filter by mode or search for a frequency. Actual onboard configuration may change.
Results: 7
Voice and ARISS contacts
Europe · ITU Region 1Crew and school contacts when scheduled. The uplink shown applies to ITU Region 1.
VHF packet and APRS
VHF packetService availability depends on the radio configuration aboard the station.
ARISS voice · Regions 2 and 3
Americas, Pacific and Southern AsiaVoice uplink for ITU Regions 2 and 3; different from Region 1.
UHF packet and APRS
UHF packet · variable availabilityUHF channel listed by ARISS. Check the current on-board station configuration and updates.
ISS SSTV · images
SSTV · scheduled eventsImage transmissions take place during announced ARISS events. Confirm the frequency and mode for the specific event.
ISS Ham TV
Ham TV · experimental signalReference from ARISS status dated October 7, 2026. This is not an ordinary FM contact channel; consult Ham TV updates.
FM crossband repeater
FM · 67 Hz uplink toneFollow Doppler on the UHF downlink during a pass. Check repeater status before operating.
No frequencies found. Try a different filter.
Published reference frequencies, not real-time operational status. ARISS.
Other amateur satellite frequencies
AMSAT references for FM repeaters, linear transponders and beacons. These frequencies do not confirm operational status; check the official satellite page.
Satellites and modes: 9
SO-50
FM · CTCSS 67 HzThe repeater uses a timed activation sequence; see the AMSAT tone instructions. Official technical page ↗
AO-91
FMBattery-related limitations; check illumination conditions and the AMSAT status page. Official technical page ↗
AO-123 (ASRTU-1)
FM · CTCSS 67 HzFM repeater; other payload transmissions use different frequencies and modes. Official technical page ↗
TEVEL2
FM · beacon 436.400 MHzTEVEL2 constellation frequencies; operation depends on each individual spacecraft. Official technical page ↗
RS-44
USB/CW ↔ LSB/CWLinear transponder; CW beacon 435.605 MHz. Do not use FM. Official technical page ↗
FO-29 (JAS-2)
SSB/CW · invertenteLinear transponder; CW beacon 435.795 MHz. Check operating status. Official technical page ↗
AO-7 · modo A
SSB/CW · non invertenteMode A; beacon 29.502 MHz. Satellite modes can alternate. Official technical page ↗
AO-7 · modo B
SSB/CW · invertenteMode B; beacon 145.9775 MHz. Check the currently used mode. Official technical page ↗
AO-73 (FUNcube-1)
SSB/CW · telemetria 145.935 MHzLinear transponder, 145.935 MHz BPSK telemetry; confirm possible activation. Official technical page ↗
No satellites match your filters.
Reference data checked on October 15, 2026. Check operational status with AMSAT. AMSAT status ↗
ISS amateur radio: your first satellite contact
FM satellites and the ISS repeater are the easiest way to start: a dual-band radio and a handheld antenna are enough.
What you need
A dual-band 144/430 MHz FM radio, ideally able to transmit and receive at the same time, and a small handheld dual-band beam. For a first listen to the highest passes, even the radio’s whip can be enough.
Doppler
On 70 cm the received frequency shifts by up to about ±10 kHz during a pass, on 2 m about ±3 kHz. In FM it is enough to retune the receiver in 5 kHz steps: start above the nominal frequency and move down as the satellite passes.
Listen before you transmit
A pass lasts about ten minutes and the channel is shared with the whole of Europe: listen, then give your callsign and locator briefly. A satellite QSO is made of a few words.
Move the antenna
The signal changes polarisation as the satellite spins: if it fades, rotate the antenna on its axis before changing direction. Follow the azimuth and elevation shown on the sky map above.
See also: Grid locator and distance · Frequencies and band plans · Antennas and measurements · SDR lab
Satellite and ISS articles and guides
RadioMeteo articles about amateur satellites, ARISS and the ISS are listed automatically after publication, in the matching language.
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