I believe the Missile Technology Control Regime, a 35 nation informal agreement, not a treaty, was updated in 2016 to limit civilian GPS system speed two 600 meters per second, and to exclude from consumer equipment those GPS designed for missiles and autonomous aircraft carrying more than 500 kg payload.
How or whether each country implements this is entirely up to them.
I have a feeling there might still be a regulation in the EAR. But I haven't found it yet.
On Sat, Aug 29, 2020, 5:08 PM Phil Karn karn@ka9q.net wrote:
I know about the Itar limits, but the fact that some manufacturers implemented the limits as altitude AND velocity while others did it as altitude OR velocity was certainly arbitrary.
I didn’t know that these limits had been removed entirely, that’s good news. I’d noticed that the kiwi sdr has an open GPS receiver in it, which got me thinking about extracting and using it independently.
On Aug 29, 2020, at 16:02, Bruce Perens bruce@perens.com wrote:
The ITAR limits on GPS altitude and speed were rescinded in 2014, which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.