[tmuir]

I would imagine that there will never be a fully open source gps, as this would allow anyone to bypass the "am I a missle?" test.

[TD-Linux]

There are already many open source implementations of GPS using SDR.

In addition, most consumer GPSes just have firmware that does the SDR bit and output NMEA strings. There's literally no reason for the driver receiving NMEA strings to be proprietary.

[tmuir]

Then what is preventing an open source implementation from exceeding the 60,000 ft and 999mph limits imposed by the US DoD?

[TD-Linux]

Nothing.

[tbr]

Ndec claimed that there is interest from QC to have as much as possible implemented as open source.

We will see how far this goes.