[time-nuts] Weird T-Bolt elevation readings...

[Michael Baker]

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
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