); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hal Murray <[EMAIL PROTECTED]> wrote: > I'm trying to check/debug some new software so I'm paying attention to the > output of a Garmin GPS 18 USB. > > It's inside my house, not a great location. Mostly, it works. But every now > and then it fades out for a few minutes. > > I'm only logging the data every minute or so, but I have counts of the > good/bad seconds. On the glitch that just happened, it was going fine with 5 > satellites. Then it faded out to 0 satellites. Two minutes later it had 5 > satellites again. The total even was under 4 minutes. > > Are glitches like that common? Does anybody have a list of what causes them? > > The only thing I can think of is multipath off an airplane. Big jets are not > uncommon overhead. I'm ~30 miles south of SFO.
Local VHF/UHF transmitters such as public service base stations or even mobile units can desense consumer GPS antennas easily. RFI-resistant GPS antennas (commercial and/or military) are available. Tim. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
