High-Altitude BerryGPS

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  • #15371
    johnmark
    Participant

    Hello,

    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

     

    • This topic was modified 2 years, 6 months ago by johnmark.
    #15383
    PeterP
    Participant

    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 --

    #15395
    johnmark
    Participant

    Perfect. This is exactly what was needed!

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