High-Altitude BerryGPS

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    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, JM



    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 --


    Perfect. This is exactly what was needed!

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