[amsat-bb] FUNcube, Educators
clintbradford at mac.com
Wed Apr 23 01:19:45 PDT 2014
I have received a couple messages regarding the 45-second video of reception of SO-73
with just a handheld radio and a meager antenna.
First, as written as captioning on that video, THAT IS NOT THE OPTIMAL MANNER
TO WORK AO-73 BY ANY MEANS. This was merely an experiment that shows you that
you can expand your horizons with a very inexpensive DIY antenna and your handheld
radio. Those with AM-receiving equipment and even better antennas are downloading
telemetry from several birds, and decoding and/or uploading that information to control
Second, the next time you read that working satellites with minimal equipment is a waste
of time and effort ... refer the writer to the story of Geoff Perry.
And then step outside and listen to a satellite or two ...
Geoff Perry took a few students outside in 1966 to demonstrate the Doppler
phenomenon with antiquated equipment - and he discovered a Russian military base
that the Russians refused to admit existed for another seventeen years ...
In October 1966 the eyes of the world became focused briefly on Kettering Grammar School.
This was due to the activities of the science teacher, Geoff Perry, who, with the help of antiquated
equipment and a team of enthusiastic pupils, managed to unlock the secrets of the Soviet Russian
space programme even before the Americans.
Extraordinarily, this was not the only time he achieved such a feat. From the early 1960's, Perry
had realised that by studying the Doppler Effect - marked by a change in the signal as the
spacecraft passed overhead - he could discover the orbit of the Soviet Cosmos satellites.
Starved of equipment - at first he was obliged to use the computer at the corset factory in Desborough - he relied on close monitoring and improvisation (his receiver needed "a smart tap with the hand from time to time"). His breakthrough came with the launch of Cosmos 112, in May 1966, which alerted him to something strange about the Soviet space effort. The satellite did not seem to have come from the usual site at Baikonur in Khazakstan. The launch of Cosmos 129 in October of that year from the same unknown site enabled him to pinpoint it.
The new site was identified as Plesetsk, south of Archangel. The USSR did not admit to its existence for a further 17 years. That same year he enjoyed another scoop when he became the first scientist to announce the launch of an unmanned Russian Soyuz spacecraft.
Perry's life changed as the world's media descended upon him. His name was often in the newspapers as he teased out one secret after another about the Soviet space programme. He realised the significance of the varying signals transmitted by satellites and was able to identify which were on short missions and which were up for longer. He even managed to track the signals monitoring the cosmonauts' vital functions from one of the first manned Soyuz craft. He inspired a growing band of space trackers among his pupils who named themselves the Kettering Satellite Group.
In the 1970's, he became space consultant to Independent Television News, commenting on the Apollo moonshots and the Apollo-Soyuz link-up in 1975. He retired from teaching in 1984, and died in 2000.
-Courtesy KSG, and others
More information about the AMSAT-BB