Yo Dan! On Thu, 25 Aug 2016 10:23:50 -0500 Dan Drown <dan-...@drown.org> wrote:
> I had setup a test along these lines a week ago: > https://blog.dan.drown.org/gps-pps-drift-when-it-has-no-signal/ Yeah, and I've been watching it. > My results were a long term average of 250us-500us lost per day > (~3-6ppb). This surprised me because of how low it was, I assume I > got lucky with the long term average temperature of the GPS module. I do not believe your data. After two weeks your GPS is still outputting sat used data. The Ephemeris timed out long ago, and the Almanac almost gone too. I think you still have a weak signal and since you GPS already had a lock it is seeing something. > Of course, this data doesn't apply to all GPS outage situations. Nor does it reflect any test I ever ran. But I admit to never testing high end gear like Trimble gear. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 g...@rellim.com Tel:+1 541 382 8588
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