[time-nuts] GPS Sat Clock Data

[Brian Kirby]

I do not know if this is what your looking for, 
http://www.nist.gov/physlab/div847/grp40/gpsarchive.cfm

follow the directions on the date....

You can look at individual SVN performance, etc.

Bob Camp wrote:
> Hi
> 
> In this paper:
> 
> TOTAL HADAMARD VARIANCE: APPLICATION TO CLOCK STEERING BY KALMAN FILTERING by Dave Howe , Ron Beard , Chuck Greenhall , Franc ̧ois Vernotte	and Bill Riley
> 
> http://tf.nist.gov/general/pdf/1459.pdf
> 
> Figure 2 actually refers to:
> 
> Navstar Quarterly Report 00-3, Space Application Branch, NRL, Wash D.C. 20 July 2000.
> 
> The report apparently describes the level of variance on the various GPS satellites versus tau for the first half of 2000. Bottom line appears to be that 5x10^-13 is about as good as it gets out to 20 day tau unless you can pick your sats. 
> 
> Obviously this data is a bit dated. 
> 
> Is this data updated on a regular basis? Is it published somewhere?  Can one get a look at it without risking a long term stay in Federal prison? It certainly would be useful to those trying to tweak GPSDO's.
> 
> Bob
> 
> 
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