🛰 ISS Mission Control
Live 3D Earth tracking with calculated orbital history, upcoming ground track and a local antenna sky plot. Drag the globe to rotate; scroll to zoom.
Location is optional. Your coordinates are processed in your browser and are not sent to the club.
📡 Upcoming ISS passes at your location
Predictions use your selected coordinates, an unobstructed 0° horizon, and current orbital elements. Times are in your device’s local time.
| AOS | Peak | LOS | Max EL | AOS bearing |
|---|---|---|---|---|
| Select your location to calculate passes. | ||||
Orange and cyan lines are calculated from orbital elements, not recorded GPS history. Predictions depend on current TLE data and can drift. AOS/LOS estimates assume an unobstructed horizon. Official ARISS radio status ↗
YOUR NEXT CONTACT COULD BE IN ORBIT.
Learn to hear the International Space Station, work amateur radio operators through its FM crossband repeater, and program your radio for your first satellite pass.
Three ways to listen and participate
📻 Listen to astronauts
Monitor 145.800 MHz FM during scheduled school contacts or occasional crew transmissions. Most ISS passes will not include live astronaut voice.
🛰️ Work the repeater
Talk to other licensed radio amateurs through the ISS. The satellite receives your signal on 2 meters and retransmits it on 70 centimeters.
📡 Explore packet & SSTV
Receive packet messages or images during announced events. Frequencies and services change, so check the current ARISS configuration before attempting them.
ISS FM crossband repeater
These are the published repeater frequencies, not a guarantee that the repeater is transmitting at this moment.
Transmit FM with a 67.0 Hz CTCSS transmit tone.
Receive FM. Adjust the receive frequency as the ISS approaches and recedes.
Doppler programming helper
Select a stage of the pass. The five channel presets below are approximate; actual Doppler varies with geometry.
Approaching
| Memory | Pass stage | Receive (MHz) | Transmit (MHz) | TX tone |
|---|
Program your radio
Generic dual-band handheld or mobile radio
Important: Some radios cannot store crossband TX/RX frequencies in one memory. Dual VFOs alone do not guarantee full-duplex operation. If you cannot hear the downlink while transmitting, use a second receiver when possible.
Baofeng UV-5R style
Use CHIRP or the radio's supported split-memory method to set separate transmit and receive frequencies. Verify the saved channel on a dummy load or with a suitable test receiver before a pass.
Yaesu dual-band mobiles
Check the model's manual for odd-split or crossband memory support. If unavailable, use separate VFOs or two radios. Program TX CTCSS on the 2 m uplink only.
Scanner or SDR
You can listen to the ISS repeater downlink without transmitting. Monitor 437.800 MHz FM and adjust for Doppler. No amateur license is required merely to receive.
Talking with astronauts is different
MHz · FM · worldwide
MHz · FM · ITU Region 2
Listen for ARISS school contacts and occasional crew activity. Do not transmit during scheduled school contacts. Only attempt a crew voice contact when a crew member is actually inviting general amateur contacts. Astronaut contacts are rare and not the same as using the FM repeater.
Before the ISS rises
Pass checklist
Operating etiquette
The ISS moves quickly and a useful pass can last only a few minutes. Keep calls brief, avoid transmitting over ongoing contacts, and do not call repeatedly if you cannot hear the downlink. Use the minimum effective power and follow your license privileges and local rules.
Current APRS note
As of the ARISS November 4, 2026 status report, APRS is listed on 437.825 MHz on the Zvezda radio during troubleshooting/testing. Do not assume older 145.825 MHz APRS instructions reflect the current mode.
Trusted resources
ARISS Contact Guide
Official frequencies, station callsigns, and contact information.
Open contact guide ↗