Thanks much for the information. A more specific question.When I do a "$PSTMCOLD", I know it clears the RT Ephemeris data. But does "$PSTMCOLD" clear any of the data used for P-AGNSS?If P-AGNSS is active (ST-AGPS right?), and I do a cold start, how...

Okay, it is possible that my testing setup is causing issues. My problem now is that I cannot find a good test environment. It seems that time of day has far more impact on my time to fix than anything else.Right now I have a good view of the sky ...

So comparing the "predictive data" vs the real time data? Is one better than the other?If I use just program the Real Time ephemeris and almanac data, that should be enough to get a very fast fix, right?

Hey again, I have verified that the PSTEPHEM commands do respond with $PSTMEPHEMOK*4B. I also do a ${PSTDUMPEPHEM) to verify that all 31 GPS satellites have been programmed. So I'm fairly sure that the data is being programmed into the chip ok...

Another question, there are options to program realtime Ephemeris, Almanac data, and the "synthetic" data. Is it necessary to program all of them from the server data.Right now, I'm just programming the real time Ephemeris data ($PSTEPHEM) and it d...