I wrote some code to process my holdover logs from the Thunderbolt with the 
newer "flat line" rev E2 temperature sensor.  

The data is a lot more consistent than I thought it was.  I am seeing around 
9.5 uS +- 0.5 uS  of drift  in the PPS output per degree C  across 4 different 
24 hour runs.   My analysis is very simple...   scan the log and calculate 
(MAX_PPS-MIN_PPS)/(MAX_TEMP-MIN_TEMP)  

It will be interesting to see how the unit performs with the old revision C2 
("better"?) temperature sensor.
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