Working the International Space Station (ISS)

If you have ever been interested in making contacts with the ISS also known as the International Space Station then you are on the right page.

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

Here is an example of the image you might be able to receive via SSTV. This was received July 7th, 2018 on 145.8 Mhz using the PD120 format. (Image is clickable for a larger view)

Recommended Reading (See below for more):

For information on Ham Radio Satellite Frequencies click HERE.

For Information on How to get started on Ham Radio Satellites click HERE>

Useful links related to the topic:

If you find something incorrect and/or have an update, I would really appreciate if you could let me know by contacting me. I like to keep things as up-to-date as possible. Thank you! - Lucas / W6AER