[time-nuts] Moving GPSDO

Joseph Gray jgray at zianet.com
Mon Oct 17 02:02:50 EDT 2016


My question was more generally about any GPSDO, but it's good to know
about the Motorola/Lucent.

What about this scenario - the GPSDO has a fixed position on initial
powerup, but then it is moved periodically or even continuously,
without updating the GPS coordinates. The distance from the original
coordinates could be anywhere from close by, to across the state.
Periodically, a new survey could be run to keep things from getting
too far out in left field.

At some point, I'll have to do some field testing, but I wanted to get
the list wisdom first.

Joe Gray

On Sun, Oct 16, 2016 at 11:08 PM, Bill Hawkins <bill.iaxs at pobox.com> wrote:
> The Motorola receivers in Lucent gear won't output a time signal if they
> don't have an initial survey.
> I make this assertion because the RFTG I had would not lock. The
> Motorola bag of bits decodes to say there's no position fix because
> enough satellites have not been acquired. Too bad I lived in a valley.
> Let us know how this turns out, starting from an initial survey.
> Bill Hawkins
> -----Original Message-----
> From: Joseph Gray
> Sent: Sunday, October 16, 2016 11:20 PM
> I'm curious to know how accurately a GPSDO will keep its 10 MHz output
> while moving. No initial survey to set a position would be done. I don't
> care about the UTC time.
> Joe Gray
> W5JG
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