Hi,
  I was running Tboltmon as the rollover occurred and did not see any phase 
shift. Old type Tbolt firmware 3.0
Maybe your phase offset was due to your Tbolt being in survey mode and its 
apparent position shifted . 

Mike


> Le 30 juil. 2017 à 02:16, Tom Van Baak <t...@leapsecond.com> a écrit :
> 
> Caught it. Some Trimble Thunderbolt TBoltmon.exe screen shots attached:
> 
> GPS WN 1959 TOW 604799 (July 29, 2017 23:59:41) advanced to
> GPS WN 936 TOW 0 (December 13, 1997) instead of
> GPS WN 1960 TOW 0 (July 29, 2017 23:59:42).
> 
> 1960 - 936 is 1024 weeks, as advertised for this version of the TBolt GPSDO. 
> Note this happened at 23:59:42 UTC as expected (that's GPS midnight - 18 UTC 
> leap seconds). I did not expect the reported 2.75 us 1PPS phase change and 
> will look into that.
> 
> /tvb
> <tbolt-20170729T165941.gif><tbolt-20170729T165942.gif><TBolt-rollover.gif>_______________________________________________
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"The power of accurate observation is commonly called cynicism by those who 
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George Bernard Shaw

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