time-nuts@lists.febo.com

Discussion of precise time and frequency measurement

View all threads

Anyone notice a GNSS anomaly this morning?

JA
John Ackermann N8UR
Fri, Sep 8, 2023 6:49 PM

At about 0400 UTC on 8 September (roughly MJD 60195.00286) I logged a
frequency glitch on a NEO-M8T that I've been monitoring (set for 10 MHz
timepulse output) with a TinyPFA.  See attached.

I'm monitoring three GPSDO off the same antenna and didn't see anything
on any of them (of course, with their control loop they'd be less likely
to show a transient event).

It was a very short event and probably some sort of local issue, but I
wonder if anyone else saw anything around then?

Thanks,
John

At about 0400 UTC on 8 September (roughly MJD 60195.00286) I logged a frequency glitch on a NEO-M8T that I've been monitoring (set for 10 MHz timepulse output) with a TinyPFA. See attached. I'm monitoring three GPSDO off the same antenna and didn't see anything on any of them (of course, with their control loop they'd be less likely to show a transient event). It was a very short event and probably some sort of local issue, but I wonder if anyone else saw anything around then? Thanks, John