Re: GPS Unit for Timekeeping on Linux?

From: Bjorn Gabrielsson (bg_at_lysator.liu.se)
Date: 11/15/04 

Date: Mon, 15 Nov 2004 22:00:46 GMT

Wayne R. <wruffner@KomKast.net> writes:

> A Trimble Acutime 2000 system would be able to give you, I think, UTC
> to 10ms. More fiddling & cost, but you'd be independent from dialup.
>

The 12XL should be able to do a few ms with some calibration.

> (Here's a Trimble Acutime kit that went on eBay just over a week ago:)
> <http://tinyurl.com/55ytu>
>

I hope it will do at least as good as the Jupiter below... :-)

ntpq -c pe
     remote refid st t when poll reach delay offset jitter
==============================================================================
+ntp.xx.se .PPS. 1 u 110 256 377 11.649 0.112 0.192
-ntp.yy.se .PPS. 1 u 120 256 377 21.048 -0.364 15.595
+ntp.zz.se .PPS. 1 u 93 256 377 17.186 0.266 0.186
*GPS_JUPITER(0) .GPS. 0 l 13 64 377 0.000 0.000 0.001