Brooke, FYI: the "prior art" for that Trimble patent is: http://leapsecond.com/notes/gpswnro.htm /tvb > Hi Matthias: > > Trimble thought they had come up with a way to account for GPS week rollover, but the Earth has not cooperated. See: > Leap-second cure for 1999 GPS rollover problem > https://www.google.com/patents/US5923618