[time-nuts] Strange GPS behaviour

Attila Kinali attila at kinali.ch
Sun Dec 30 10:33:40 UTC 2012


On Sat, 29 Dec 2012 19:20:16 -0800
Said Jackson <saidjack at aol.com> wrote:

> We recently did a test by putting an antenna in a side window in
> the office that had maybe 10% view of the sky, then let the unit
> run in mobile mode while doing the auto survey. After two days,
> we switched it into position hold mode. Most of the time it sees
> only one sat direct, all others are only seen through multipath.
> The results are astonishing, SD went down from about 30ns+ to about 8ns.
> Spikes to +/-150ns went away completely.

PHK reported something similar a quite while ago:

> I can post some GPSCon graphs of this  significant improvement during the test next week if there is interest.

More graphs are always desirable :-)

			Attila Kinali

There is no secret ingredient
         -- Po, Kung Fu Panda

More information about the time-nuts mailing list