More guessing. I wonder if the altitude you see is from the difference between Mean Sea Level and Height Above Ellipsoid?
This document has a map on page 7 - http://www.avionicswest.com/PDFiles/alt2.pdf Still no expert Darrell ----- Original Message ----- From: "Michael Baker" <[EMAIL PROTECTED]> To: <time-nuts@febo.com> Sent: Saturday, March 29, 2008 5:49 AM Subject: [time-nuts] Another Trimble Tbolt question.... > Hello, All-- > > Thanks to the collective savvy of this list and the > patient assistance of Ken Winterling <wa2lbi> I was > finally able to get my Tbolt to stop requiring me > to configure the COM-4 channel every time I ran > the monitoring software. > > So-- I had such good luck with that question, I'm > going to pester the group with one more Tbolt question: > > In the "Position" area of the Tbolt monitoring display > my altitude is given as 1.4 meters. The USGS topo map > and a recent survey both say that the ground level > at my house is 84 feet above MSL. The antenna for the > T-bolt is on the top of my house 19 feet above the ground. > > If I open SETUP / POSITION and "SET ACCURATE POSITION" > to, say....: 28 meters and enter that value, the indicated > altitude changes to 28 meters, but the next day or so, > I always find that it has reverted to 1.4 meters. > > Admittedly, having a (relatively) accurate altitude > display is of minor importance to me since my primary > reason for having the Tbolt is for a decent 10MHz reference. > > However, as a matter of principle it would be nice to > have the altitude display be a little closer! > > Any suggestions as to how to get the Tbolt to > display a more correct altitude? > > Thanks! > > Mike Baker > WA4HFR > Micanopy, FL > --------------------- > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
