Re: 1 PPS on a rotating antenna

Isaac Wingfield wrote:
In article <kAnMf.791382$x96.765647@attbi_s72>,
Sam Wormley <swormley1@xxxxxxxxx> wrote:


Alan Browne wrote:

Sam Wormley wrote:

The relative motion of the receiver is arbitrary and not be a factor.


Not sure what you mean, but the operating guide to one of the receivers we're looking at states clearly that the receiver has to be not moving (relative to the ground) for 3 minutes before the PPS is aligned with UTC second crossings. It is this that has prompted my question to the group ... eg: how much eccentric motion (cm level) would still be perceived as "static" by the receiver.

Cheers,
Alan

The satellites are moving and the earth is rotating. The only
thing I can think of that would matter is blocking satellite
reception by moving under tree branches and other obstructions.


I got a "time standard" GPS and set it up where I used to work. The documentation said that in timekeeping mode, the Kalman filters are set up differently -- they assume that the receiver is stationary, so any variation in the signal that "looks like" a velocity vector is not treated as such. That allows a more accurate solution for time.

Isaac


Thanks Isaac.
-Sam
.

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