[ntp:questions] GPS and the December 5/6 Solar Flare

[Hal Murray]

>I still have a question unanswered: are there any method to pass over
>a long GPS failure (say for several days or more) - supposing the GPS
>is the
>only source of time and the server have a very good (10E-12) PPS
>source (Rubidium or Caesium) ?

Google for Z3801A.  It's basically a box with a very good crystal
oscillator, a GPS receiver, and a pile of software.  If the GPS
goes down, it coasts on the crystal.

How long you can coast depends upon how good your clock is and/or
your accuracy requirements.

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