There are several ways you can go about this, depending on operating schedules and gear on-board. The best know of course is making contact with the astronauts. This is generally done with schools and by arrangement. If you hear one of the above, please do not interrupt them. Only call if you are hearing a CQ or hear a pileup.
There is an APRS repeater as well as a the occasional SSTV transmission This is one way, receive only! Please do not try and send back an SSTV image with a reply as you would on the HF bands generally speaking. Details are subject to change so please check this often.
Currently used Frequencies by the ISS:
- Voice and SSTV Downlink: 145.80 MHz
- Voice Uplink: 144.49 MHz for ITU Regions 2 & 3
- Voice Uplink: 145.20 MHz for ITU Region 1
- VHF Packet Uplink and Downlink: 145.825 MHz
- UHF Packet Uplink and Downlink: 437.550 MHz
- UHF/VHF Repeater Uplink: 437.80 MHz
- UHF/VHF Repeater Downlink: 145.80 MHz
- DATV (Ham TV) Downlink: 2395.00 MHz
For Information on How to get started on Ham Radio Satellites click HERE>
Useful links related to the topic:
If you find something incorrect, have an update, or if there is something you would like to see added, drop me a line here. I like to keep things as up-to-date and as accurate as possible. Thank you! - Lucas / W6AER