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    Re: GPS Anti-Spoof Accuracy
    From: David Pike
    Date: 2023 Nov 15, 07:38 -0800

    Bob Goethe you wrote:  On my phone, GPS Anti-Spoof typically reports an error-ellipse of ± 4 meters.  Do others of you get a similar sized error ellipse?  Or is this driven by the quality of the GPS receiver in my particular model of phone?

    Does it not vary?  I just switched mine on.  It was still on Eltanin (I can only just remember why) and varying between +- 3 and 4 once it found some satellites.  Frank will tell you best, but my guess, and it’s only a guess, is that it varies mainly with signal strength and satellite geometry (the dreaded PDOP? which I once sat an exam about but have long since forgotten).  ‘Firmware’ might affect it slightly depending upon how your receiver deals with these. Usual caveat. DaveP

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