[time-nuts] GPS tick all over the place. Suspect aurora effects

John Ackermann N8UR jra at febo.com
Thu Jan 26 21:02:29 EST 2012

Tom Van Baak said the following on 01/26/2012 08:24 PM:
>> google for "Space Weather Effects on GPS"
>> there's a presentaton by Thomas Bogdan at the Space Weather Prediction
>> Center that gives you some numbers to work with.
>> 10s of meters effects aren't unusual.
> There's a wonderful example of GPS timing and space weather in a
> paper by fellow time-nuts Rick Hambly and Tom Clark.
> Rick was calibrating a set of Motorola Oncore receivers at USNO and
> happened to capture the massively disrupting effect of a rare Aurora
> on September 7, 2002.
> There's a mention of this in his paper:
> http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed.pdf
> But the best part are the sky photos and plots on page 17 and 18 here:
> http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed_VG.ppt

Not nearly as pretty, but I caught a major flare in 2006 in some GPS 
signal strength data that I was recording at the time:


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