I am giving a presentation about satellite tracking software to the local club next week.
Their theme for the year is fox hunting. I thought I remembered that some time in the past there was talk of or an actual event that took place of doing a foxhunt via amateur satellite. I seem to remember something about transmitting a tone and using the shift to determine the location. Now this may be a couple of cross synapes and I am getting my stories mixed.
If anyone knows of any such event or better yet participated in one, please let me know and pass along some of the particulars.
Thanks, Gould, WA4SXM
First demonstrated on OSCAR-6 see
(WO/1999/041723) APPARATUS AND METHOD FOR LOCATING MISSING PERSONS, ANIMALS, AND OBJECTS http://www.wipo.int/pctdb/en/wo.jsp?IA=WO1999041723&DISPLAY=DESC
"Animal tracking tags using Ultra High Frequency (UHF) Transmitters provide long-range tracking through orbiting satellite receivers by using very low data rates. The low data rates allow the use of very narrow bandwidths to communicate the animal's identification and to determine the animal's position by measuring the Doppler shift of the transmitter's carrier. This technique was first demonstrated using the OSCAR 6 amateur radio satellite and has been used to locate Emergency Locator Transmitters (ELT) from downed aircraft and hikers. Unfortunately, narrow band systems can only service a limited number of tags."
73 Trevor M5AKA
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participants (2)
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Gould Smith -
Trevor