The commercial GPS sensor is more for testing on the receiver properties, it won't give location data. Location data will come from a space-rated GPS we have in the bus.

As long as you're below the GPS constellation (at around 26000 km: http://www.navipedia.net/index.php/GPS_Space_Segment), and you use a GPS that doesn't have the altitude restriction, you can use it for orbit location determination.

Cheers, Joel

GPS can be used on board to do low earth orbit determination.