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May 10, 2010
News - Sending a Balloon Into Ne… |
about 3 years ago
Jonathan according to the online documentation for that module … one of its operational limits is less 18,000 meters. Bottom line … anything over 60,000 feet forget it.
That is why I gave the model number to a GPS module that does not have that Firmware restriction on it.
Other than some of the old Motorola OnCore modules .. it is the only one that I know that doesn’t have a limit at 60,000 feet.
Since we launched our balloon on the East Coast area of Virginia and we had Hurricane Danielle kicking in the Atlantic Ocean, we were tracking speeds above 90,000 feet in the range of 300+ mph. They were realistic speeds because our balloon didn’t come down until it was almost 120 miles away from our launch point. We had full radio transmission of GPS data during the entire flight.
Lesson Learned - READ the entire specification sheet on something you are buying. It clearly states all of the standard limitations for the module you got.
It is possible to get a GPS module that works greater than 60,000 FT. We sent our balloon up during the summer and reached a transmitted altitude of 103,258 Ft. We used the ISM300F2-C5-V0004 module from Inventek. This module is rated to 135,000 Ft. I also got the Active Patch antenna to help with reception of the GPS signals.
I wish this place would make the adapter boards to use with those modules and already have them SMD soldered. I did it myself but it was a pain in the rear. The module worked great and I think it would be a wonderful add to the inventory here.
Unlike what this guy did, since were were in the Hackerspaces in Space Contest, are budget was limited to $250 or less. I would have loved to used the wireless modems that was used in this project.
I had originally started the project with an Arduino board that I got from Sparkfun but ended up building a custom circuit because I needed the serial lines to the GPS and I didn’t want to mess with SoftSerial; however, it was a good start since I never messed with one before.
If you want to see what we did, you can checkout our page at http://757labs.org/wiki/Projects/hackerspacesinspace
It was our first our first try at a balloon launch and we were very pleased with what we did.
No public wish lists :(