[time-nuts] Thunderbolt Rollover Testing

[Mark Sims]

Does it have a saved/surveyed position?  With a saved position you can reasonable time performance with 1 sat.   Without a saved position all bets are off,  there is no way for the receiver to determine the receiver/satellite clock difference.

Trimble reports that the device is in "over-determined clock" mode if that is how it is configured.  Even if it is in "over-determined clock" mode the receiver may not have enough data to do anything effective.   Trimble's overdetermined clock mode is basically a "position hold" mode.
   
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>I just re-checked this with a Resolution-T, and it does go into OD mode with all but 1
SV masked from cold restart using a real SV.