- you can get the GPS calculated alitutde on the satlighht page > -----Original Message----- > From: geocaching-bounce@xxxxxxxxxxxxx > [mailto:geocaching-bounce@xxxxxxxxxxxxx]On Behalf Of > goshhawk@xxxxxxxxxxx > Sent: Saturday, August 16, 2003 11:17 AM > To: geocaching@xxxxxxxxxxxxx > Subject: [GeoStL] Re: GPSr use in commercial aircraft > > > - > I have a question about GPS altitude measurement. > I think that my Garmin Vista determines altitude by sensing barometric > pressure. In an aircraft cruising at 37000 feet, the inside cabin altitude > is maintained at about 8000-9000 feet. Thus wouldn't the GPSr only read > cabin altitude and not the actual height above ground ? > > What is the general altitude measuring source in GPSr's? > > > ****************************************************************** > ********** > Our WebPage! Http://WWW.GeoStL.com > Mail List Info. //www.freelists.org/cgi-bin/list?list_id=geocaching > Mail List FAQ's: //www.freelists.org/help/questions.html > > ****************************************************************** > ********** > To unsubscribe from this list: > send an email to geocaching-request@xxxxxxxxxxxxx with > 'unsubscribe' in the Subject field > > > > **************************************************************************** Our WebPage! Http://WWW.GeoStL.com Mail List Info. //www.freelists.org/cgi-bin/list?list_id=geocaching Mail List FAQ's: //www.freelists.org/help/questions.html **************************************************************************** To unsubscribe from this list: send an email to geocaching-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field