[time-nuts] ublox NEO-M8T improved by insulated chamber?
Gary E. Miller
gem at rellim.com
Tue Nov 7 20:40:54 UTC 2017
Yo Lars!
On Tue, 7 Nov 2017 20:32:19 +0000
Lars Walenius <lars.walenius at hotmail.com> wrote:
> Another question: If You have an error in the surveyed position of
> say 3meters and you receive all of the available satellites in all
> directions how much will this really affect your timing?
I'll oversimply a bit by repeating Adm. Grace Hoppers famous giveaway.
When asked, she handed out 9 inch long peieces of wire, and said: that
is a nanaosecond.
3m is about 118.11 inches is about 13 ns. So worst case, skipping the
3D math, yoy get about +/13 ns.
Which is small compared to the published GPS time resolution (IS_GPS_200H,
page 54) of 90 ns.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem at rellim.com Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can’t measure it, you can’t improve it." - Lord Kelvin
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