377 21 #1 October 12, 2010 http://www.dropzone.com/cgi-bin/forum/gforum.cgi?post=3971131#3971131 We put together some really cheap GPS and physio telemetry just for fun and it works great. It transmits on ham radio frequency 144.390 MHz and is used by jumpers who are licensed hams. It can't legally be used for commercial operations, but if you could get a license for a business telemetry frequency the rest of the gear is plug and play (sensors, data decoders, radio modem etc). Data loggers worn by jumpers do a fine job but it's fun to see live radio telemetry on the ground and if a jumper landed waaaay out we'd have the GPS position data. We'll be flying live 1.2 GHz video at the Byron Boogie www.bayareaskydiving.com on Oct 16 2010. It will be relayed through a ham TV repeater on Mt Diablo to the Pacificon ham radio convention that is taking place in San Ramon. Watch the jump telemetry on www.aprs.fi on October 16. Use KF6WRW as the search term, jumper 2's callsign. I imagine commercial test jumpers sometimes use radio telemetry gear ($$$$) and hoped this post might stir up some interest in and dialog about cheap home brewed systems. 3772018 marks half a century as a skydiver. Trained by the late Perry Stevens D-51 in 1968. Quote Share this post Link to post Share on other sites
727_Jumper 0 #2 October 12, 2010 kewl! I've been to Pacificon many times.. good times (if you're a ham) I'm gonna have to check this out! Quote Share this post Link to post Share on other sites
Hvance 0 #3 October 12, 2010 Neat idea. I wish Google Maps had an "Avoid Ghetto" routing option. Quote Share this post Link to post Share on other sites
727_Jumper 0 #4 October 13, 2010 any links to sites with info on the hardware? ATV would be cool as well Quote Share this post Link to post Share on other sites
377 21 #5 October 18, 2010 Our group did ham radio jumps at the Byron Boogie last weekend (Oct 16 2010). Telemetry gear worked great sending GPS position and altitude data and heart rate and blood oxygen levels using a pulse ox fingertip sensor and a GPS puck hooked up to an APRS transmitter on 144.390 MHz. This time we borrowed some ATV (Amateur Television) gear from the Mt Diablo Amateur Radio Club and gaffer taped it to Beatnik's rig and helmet. It operated on 1.2 GHz and linked through the Mt Diablo ATV repeater to cover a very wide area. Ham attendees at Pacificon 2010 in San Ramon got live TV coverage of our hop and pop canopy rides from 13.5. They LOVED it. We chatted with a lot of them on 2 Meter FM simplex 146.46 MHz during the long (and very scenic) ride down. 3772018 marks half a century as a skydiver. Trained by the late Perry Stevens D-51 in 1968. Quote Share this post Link to post Share on other sites