I went ahead and did the math based on some of your numbers. I was a little unclear on which numbers to use.
-2E-10 in frequency over 5 minutes, is -60ns. 60ns is not completely unreasonable for an ionospheric delay variation over hours, but I think it would be unusual for there to be so much tumult in just 5 minutes though. (Especially when geophysical K index has been particularly calm lately.) On the other hand, -2E-10 over 3 hours, is -2 microseconds which is just huge! Do you have anything like a graph of phase difference or EFC over those 3 hours? Tim N3QE On Wed, Sep 30, 2015 at 1:54 AM, James Flynn <james.fl...@csun.edu> wrote: > I recorded apparent anomalous activity on the GPS signal received near Los > Angeles from about 0200Z to 0500Z 30 Sept. The 1PPS received signal > shifted by -2E-10 in frequency (5 minute averages). > > There is a notice on the GPS website about possible interference today (29 > Sept) through 30 Sept in the area of 253 nm around China Lake, CA. (which > includes Los Angeles) > > Anyone else near LA notice anything? > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.