[ANSS-netops] Altus/K2 timing issue

[Jon Rusho]

UUSS experienced an early roll-over of the GPS 1024-week counter in many 
of our Kinemetrics K2 instruments this weekend.   Looking at IRIS, this 
appears to have also impacted other networks.   The problem manifested 
itself as waveform data being timestamped in 1998 instead of 2018.

I'm testing a software fix in the k2ew Earthworm modules.   For data 
that comes in timestamped between 1998 and 01-July-2018, I shifted the 
time by 1024 weeks (619315200 seconds).

My question to all of you, is this the correct shift or am I missing 
something?


More info on the GPS rollover: 
https://spectracom.com/resources/blog/lisa-perdue/2018/gps-2019-week-rollover-what-you-need-know



Thanks
--jon




-- 
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Jon Rusho
Seismic Network Engineer
University of Utah Seismograph Stations

jon at seis.utah.edu
801-585-5523