On Fri, 3 Feb 2006, David J Taylor <[EMAIL PROTECTED]> wrote
Chris Hastie wrote:
Since GPS satellites are not geostationary, does it matter which bit
of the sky the unit can see? My office window faces north, which
clearly would be no good for geostationary satellites from the
northern hemisphere, but how about GPS?
No, the region doesn't matter, just the percent sky coverage. There's
no need to be high up - sitting in the middle of the garden would be
fine, providing you can see a good fraction of the overhead sky.
Thanks for that. Another question to show my ignorance of GPS. You said
elsewhere that a view of 4 satellites was needed. I've often wondered
why so for time keeping? I can see why for positioning, but I can't help
thinking with a static unit surely it should be able to work out the
time from one providing you accurately tell it where it is?
--
Chris Hastie
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