The GPS altitude is calculated with respect to the geoid.
The geoid surface may have a vertical separation from the actual surface
by several meters.
This correction varies with location on the Earth's surface.
Bruce
Michael Baker wrote:
Hello, TimeNutters--
While we are on a thread about Trimble T-bolts,
perhaps someone might expand on why my T-bolt
does not ever come up with altitude readings that
are even close. After a long fix, the Lat-Lon
coordinates are pretty close, but the altitude
is always given as around 2 meters. We are pretty
low here in Flori-DUH, but not THAT low. My
ground elevation here is 28M ABMSL and my
GPS antenna is another 8M above that on top
of my fireplace chimney. I have roughly 50 ft
of RG-59 cable on the antenna, but altering the
cable length value does not seem to have any
effect. I get these same very low altitude readings
with TBOLTMON and Lady Heather v3 beta.
Since I know my altitude well withing one meter,
should I enter that manually? What is the
procedure for doing that?
Suggestions...??
Thanks!!
Mike Baker
-------------------
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
