Home › Forums › Forums › Technical Support for BerryGPS and BerryGPS-IMU › High-Altitude BerryGPS
Tagged: COCOM, Flight, High Altitude, Logic
- This topic has 2 replies, 2 voices, and was last updated 3 years, 2 months ago by johnmark.
- March 11, 2020 at 12:39 am #15371johnmarkParticipant
I am planning to fly the BerryGPS as part of a high-altitude hydrogen-balloon payload, and, having done a little bit of research, found out from a very experienced source that
“GPS units [are tricky] as they’re required by law to conform to COCOM limits (https://en.wikipedia.org/wiki/Coordinating_Committee_for_Multilateral_Export_Controls). This means they’re supposed to stop creating position/velocity solutions when they’re above 18000m altitude AND moving faster than 1000 knots. Not a problem for balloons. HOWEVER, most manufacturers implement this as an OR instead of an AND, which can make it a VERY BIG problem for balloons!”
Do we have any information about how this logic is implemented into the BerryGPS module?
Thanks in advance, JMMarch 11, 2020 at 1:56 pm #15383PeterPParticipant
By default the maximum altitude of the BerryGPS-IMU is 12000m. By setting the navigation platform with the UBX-CFG-NAV5 message to airborne (<1G, <2G or < 4G) the maximum altitude can be increased to 50000m .
The max velocity is 500 m/s
More info here
Peter --OzzMaker.com --March 12, 2020 at 1:39 am #15395johnmarkParticipant
Perfect. This is exactly what was needed!
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