Dan, in recent years I've read that DOD (or some such agency) has been running spoofing tests here and there, but always in remote thinly-populated areas (for what should be obvious reasons).
As to why not all your receivers exhibit the "finger", I point out that the appearance of a GPS satellite "in the hole" must be treated as an exception, and different combinations of receiver HW & FW with different analysis & display SW could plausibly react differently to such exceptions. I suppose such behavior should be called "bugs", but I would not be too harsh on the designers unless this "bug" also led to erroneous PVT output. In any event, about all I can say is "What a grand mystery!". Dana On Mon, Nov 15, 2021 at 8:24 PM Dan Kemppainen <d...@irtelemetrics.com> wrote: > Hi, > > The adafruit board had a run with the LTE-LITE and Ublox. Adafruit board > shows no birds above the north pole. Same as does the LTE-LITE on this > run. Again, the Ublox shows them up there according to LH. (At least > everything is consistent!) (The curious of you can view the attached plots) > > Currently running some logs of raw data from all three GPS modules. > We'll give the logs 24 hours and run them through U-Center tomorrow. > > As for right now, eliminating the antenna and mounting location are the > most important part. It's getting to be winter here, and snow makes > getting to the antenna difficult/dangerous. > > > Dana, > > I would be highly surprised if anyone were spoofing GPS here. We're > pretty much in the middle of nowhere. Besides, why only Ublox modules > giving the fits on LH? > > > Keelan, > > Thus the confusion as to why there's birds above the north pole. This > has happened on two PC's with Two different models of Ublox Modules. Two > other brand modules seem OK on LH. > > Certainly odd. > > Thanks, > Dan > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.