[ntp:questions] NTP architecture recommendation

Uwe Klein uwe_klein_habertwedt at t-online.de
Mon Aug 20 08:02:12 UTC 2007

Hal Murray wrote:

> Another is differential GPS.  You put another unit on a known
> location.  Nearby units will have the same error pattern.
> If your known unit says it is off 100 ft to the north,
> you can correct nearby units by subtracting that from
> their reported position.

That is what all the surveyors use here.
You see one big yellow Box on a tripod over a Reference Point
and the workcrews in the vicinity.
It is very popular because you only need L1 and
coarse aquisition
and aside from switching GPS  off is very robust to
any systemic degradations.


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