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www.southgatearc.org
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ISS crew, ARISS team troubleshooting slow-scan TV systemThe Amateur Radio on the International Space Station (ARISS), www.rac.ca/ariss,
team is coordinating with Expedition 13 Commander Pavel Vinogradov, RV3BS,
and ARISS-Russia's Sergei Samburov, RV3DR, to troubleshoot the slow-scan
television (SSTV) system onboard the ISS. ''Photos of the current SSTV configuration that were downlinked to Earth showed several unanticipated results from the initial tests,'' ISS Ham Radio Project Engineer Kenneth Ransom, N5VHO, told ARRL. ''More extensive troubleshooting is being developed and could further delay permanent activation of the radio.'' He pointed out that Vinogradov is only able to work on the system in his free time. Vinogradov is also due to return to Earth in September. During the early stages of SSTV testing in late July, Earth station operators were thrilled to receive several pictures Vinogradov was able to transmit manually on 2 meters (the system has been using 144.490 and 145.800 MHz) using the RS0ISS call sign. Ransom says initial tests were run over Moscow, and then the system was left on for a few orbits. Plans call for Vinogradov to continue checking out the SSTV Miles Mann, WF1F, who developed the SSTV system as an ARISS project, explains that slide-show mode will permit the crew to preload a directory of images that then will automatically transmitted to Earth. ''The crew will not need to keep pushing a button to send images,'' he said in a recent news release. ''In theory, the system can run for weeks at a time without crew involvement.'' The SSTV system is not yet configured to receive SSTV transmissions from
Earth stations. Source: The American Radio Relay League
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