The ITAR limits on GPS altitude and speed were rescinded in 2014, which doesn't mean every manufacturer has removed them. But they were not arbitrary, they were government-imposed. It just happened that some manufacturers implemented them as limits on both being over 60,000 feet and 1000 miles per hour at the same time, others on exceeding either the speed or the altitude.
It's perfectly fine to have a check box that says "the station will not be on the surface of the Earth", if your program is actually capable of that sort of operation (I doubt this one really is), but in general it is good practice to protect the user from foolish inputs unless they check that kind of box.
On Sat, Aug 29, 2020, 3:37 PM Phil Karn via AMSAT-BB amsat-bb@amsat.org wrote:
On 8/29/20 10:52, Bruce Perens via AMSAT-BB wrote:
It's a software bug when the software quietly accepts an impossible parameter.
It's not an impossible value. Balloons can reach 35 km without too much trouble. I don't like software with arbitrary limits imposed by authors who lack the imagination as to how people might use it. Ballooners already have enough problems with arbitrary altitude limits in GPS receivers.
Phil
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