Does anyone know of any >60k ft capable modules that have been integrated with APM? I'm interested in using GPS for HAB cut-down, autorelease + navigation. I will be running the MediaTek up in the simulator over the next few weeks but I'm pretty confident that I already know the outcome. This test will be mainly to see how well it recovers. I'd prefer not to fly open loop. There is a 2010 thread mentioning Inventek though I don't see evidence that it's been integrated with APM.
Additionally, does anyone have experience with the BMP085 above it's 9k spec?
Thanks for responding! (even though this was a while ago). I ended up with my tried and true Novatel which can have the limits easily removed for $1k but I am still interested on this if it's possible.
The project is for DARPA, so we could be considered "government users" to a certain extent. Do you still do this modification work?
There may be a couple of COTS receivers that will work though I share Gary's concern about high dynamics. A couple are listed in this thread: Link If you have access to a simulator you can test. In my case high dynamics are most likely after balloon release. The risk being that the reciever would loose GPS and not reaquire until the airframe is flying normally, perhaps to lower enough velocity. The Venus GPS spec says that either limit, not both, can be violated (search SparkFun). Another thread on this topic with more listings: link2 link3 Inventek GPS reference: Inventek. Some anecdotal info from HAB launches exists since these payloads are travelling at relatively high velocities and spinning while either keeping GPS or reacquiring. Some GPS position and velocity data is posted at various sites. Hopefully this is helpful.