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I posed the question on a newsgroup alt.satellite.gps about obtaining timing
for celestial navigation (current thread mentioned below) from a gps
receiver:

| >I am the originator of the current thread. I was thinking about how one
| >might use a GPS receiver as the time source for celestial navigation
fixes
| >at sea. I really do understand that the "current" time is available from
| >several NMEA sentences and that these sentences incur some latency. I
| >suspect WWV and a good quartz clock is better.
| >

and I receive the following as one response:

| Surely for celestial navigation, errors of sighting are MUCH worse than
the
| possible 1 or 2 second errors of GPS time as transmitted in the NMEA
| sentence.  Since time seconds and arc seconds roughly correspond in this
| application, I would ask whether you seriously think you can measure the
| position of a celestial body to within 1 arc second under normal
navigation
| conditions.
|

Does this response make any sense?

Any enlightenment will be appreciated.

Vic

________________________________________________________

Victor Fraenckel - The Windman                 vfraenc1@nycap.rr.com
KC2GUI                                                      www.windsway.com

      Home of the WindReader Electronic Theodolite
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