[time-nuts] GPSDO disciplining algorithms

Tim Shoppa tshoppa at gmail.com
Mon Apr 13 13:21:51 EDT 2015

See especially Appendix A here:

The HP goal was specifically to meet telco 48-hour holdover specs. Others
here have had vastly different concepts of holdover length (sometimes just

Tim N3QE

On Mon, Apr 13, 2015 at 9:03 AM, Alan Ambrose <alan.ambrose at anagram.net>

> Hi all,
> I'm interested in GPSDO disciplining algorithms - presumably the good ones
> are really well thought out stochastic control algorithms.
> Is it possible to point me to the seminal references / papers / datasheets
> that describe typical algorithms and the advantages and disadvantages of
> the various approaches?
> I can see, for example:
> http://tycho.usno.navy.mil/papers/ts-2000/gpstime.steering.kmm.ion.sep00.pdf
> Am I right in thinking that this subject area usually called 'GPS
> disciplining' or 'GPS steering' in the literature?
> TIA, Alan
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