GW7ERI AMATEUR RADIO

TUTSHILL - CHEPSTOW - MONMOUTHSHIRE

UNITED KINGDOM

IO81QP  -  51.38.22N  -  02.39.48W

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Amateur Radio On the ISS Slow Scan Television

 

On October 12th 2008 members of the crew of Expedition 18  took off  from the Russian base at Baikanur on board a  Soyuz spacecraft, destined for a stay on board the International Space Station

 


Expedition 18 Lift Off

 

One of the crew members was Ham Radio Operator Richard Garriott W5KWQ.

Members of the Amateur Radio on the International Space Station (ARISS) team had been planning for some years to launch a series of experiments in which Slow Scan Television (SSTV) images would be transmitted using Ham Radio equipment from the ISS.

The SSTV mode, developed in 1957/8, is a method of transmitting images scanned one line at a time in a similar way to sending a document by fax. Picture information is sent as a series of audio tones.  During the early Apollo missions, images were transmitted back to mission control using this mode.

Ham Radio operators were invited to take part in the experiment, and forward their received images to the ARISS team for evaluation. Transmissions began on 15th October 2008, and marked another mile stone in the history of Ham Radio space communications.

Below are the images received here in Tutshill. My equipment for the experiment comprised the Yaesu FT847, controlled by Ham Radio Deluxe Software. The HRD software allows the receive frequency to 'track' the progress of the ISS orbit, and compensate  for Doppler Frequency Shift effect.  The received audio tones were fed to my Dell E520 pc sound card, where the  picture decoding and processing was achieved by MixW2 software. The antenna was a simple 5/8th wavelength 2 meter band mobile whip, mounted only six feet above the ground. (This antenna is normally used in my lightning detection experiment.)

I have also provided an audio file for download for those interested in hearing an SSTV signal. This file was recorded during one of the ISS passes and can be heard by clicking

 SSTV Audio

All images on this page with the exception of the received SSTV pictures, are courtesy of NASA, and I thank them for making these available for general use.

Recorded 0827 18/10/08 Recorded 0851 19/10/08

Recorded 1024 19/10/08 Recorded 1224 19/10/08

Recorded 0920 20/10/08       Recorded 1054 20/10/08

Recorded 1229 20/10/08   Recorded 1112 22/10/08

                                        

An audio recording of Richard making contact with  Radio Hams across Europe is available here:

ISS Audio

A message from Richard, sent following his return to Earth can be read by following the link:

W5KWQ 

The European 'Amateur Radio On The International Space Station' (ARISS) web site can be reached at :

http://www.ariss-eu.org/