GPS receiver

I spent a chunk of today implementing tools to capture and examine the data from a Trimble Copernicus GPS receiver chip.  Unfortunately, even though it supports the output of "raw" measurements, the pseudorange (in meters) can't be derived easily (if at all), and the Doppler measurements appear to be an order of magnitude larger than they should be.  The SNR measurements look appropriate (in dB*Hz), but I'm uncertain about the phase measurements.  It may turn out to be totally useless for science, which would be disappointing.

I'll have to look into this further next week.