IO81QP  -  51.38.22N  -  02.39.48W


























The International Space Station




Following on from the success of the MIR Space station, construction began in 1998 of the International Space Station (ISS.) The Space Station is a truly international effort, comprising a partnership between the space agencies of  the USA, Russia, Japan, Canada, and The European Space Agency.

Expedition 1 crew took up residence on 2nd November 2000, and there has been a permanent presence ever since. Crew members carry out scientific experiments in the various labs and modules which make up the ISS, in areas such as biology, chemistry, physics and astronomy.

It's not all hard work though! Click on the 'Play Video' link below to take a look at a short video showing a light hearted view of life in space. Make sure to have your speakers on!

Play Video 

Apart from their day to day work load of research and maintenance chores, many of the astronauts and cosmonauts hold Amateur Radio transmitting licenses. During missions members of the crew often make radio contact, in their free time, with fellow Hams back on Earth.. The project, which used to be called SAREX (Space Amateur Radio Experiment) is now known as ARISS (Amateur Radio on the International Space Station.) ARISS is sponsored by AMSAT, ARRL, and NASA. The ARISS web site can be reached at: 

The Space Station orbits Earth at approximately 190 miles (350 kilometers) high, traveling at a speed of 17,210 miles per hour (27,700 km/h.) Being in a low orbit makes it possible to view the Space Station with the naked eye as it passes overhead. With satellite tracking software passes can be predicted. Details of pass schedules for the Chepstow area, along with information on tracking software, can be found on my ISS Visibility page from the menu link on the left. 

In addition to talking with Hams, the crew also make pre arranged contacts with schools and colleges around the world. Students then get the opportunity to speak directly to the astronauts, asking prepared questions via a Ham Radio link. The radio equipment and links are set up by ARISS volunteer teams.

Amateur radio equipment on board the ISS currently comprises 2 meter and 70 centimeter band transceivers which are located in the crew living quarters.

APRS packet equipment is also installed. This again operates within the 2 meter Amateur band, and can be received on a frequency of 145.825 Mhz

Voice downlink transmissions can be heard on 145.800 Mhz.

More information on Amateur Radio on board the International Space Station, along with current operating status can be found at the ISS fan club web site at:


   ISS Amateur Radio Frequencies in use are:

Mode V/V Crew Contact (Region 1): Europe 
Uplink: 145.2000 MHz FM 
Downlink 145.8000 MHz FM 

Mode V/V Crew Contact (Regions 2 & 3): Americas and Asia
Uplink: 144.4900 MHz FM 
Downlink 145.8000 MHz FM 

Mode U/V (B) FM Voice Repeater (Worldwide): Non-Operational 
Uplink: 437.8000 MHz FM 
Downlink 145.8000 MHz FM 

Mode V Imaging: 
Downlink 145.800 MHz SSTV 

Mode V/V Packet (Worldwide): 
Uplink: 145.825 MHz AFSK  AX.25 1200  BPS 
Downlink 145.825 MHz AFSK AX.25 1200 BPS


Click here to access a 'notepad' window containing the above

frequency information for printing.

NASA ISS Ham Radio Reference Page


All images on this page are courtesy of NASA.