2014

updated 8-12-2014

The attached file below has the antenna height removed! These are true ground (ramp) elevations

Updated 7-10-2014

OK, the gist is you need to subtract 2.0545 m from the heights in the trajectory to yield the surface. My (now completed) notes from the survey are below: 140510 BGTL ramp survey 1300 data on 1345 moving 1459 data off usual base station (02qr and Ashtechs) UAVJ is the vehicle vehicle antenna: Ashtech 701945-01 rev E Antenna height measurements for the vehicle: -mag mount choke-ring antenna was placed on the roof of a Greenland Contractors van -Antenna height measurements were made to the very top of the antenna housing, with the vehicle loaded as for the survey -measured height between top of antenna housing and top of chokerings: 3.9 cm -heights measured inside hangar 8 on flat smooth concrete floor, away from drains -pre-survey measurements: 214.1/214.7/214.7 cm driver side AVG=214.5 cm 215.1/215.5/215.6 cm passenger side AVG=215.4 cm -post-survey measurements: 214.1/213.6/213.7 cm driver side AVG=213.8 cm 214.9/215.1/214.9 cm passenger side AVG=215.0 cm -post-survey measurements: 214.7/214.5/214.8 cm driver side AVG=214.7 cm (turned vehicle 180 deg) 214.8/214.8/215.3 cm passenger side AVG=215.0 cm -average pre-survey height: 214.95 cm -average post-survey height: 214.60 cm -overall average height: 214.78 cm -overall average height to top of chokerings: 210.88 cm -overalll average height to LC phase center: 205.45 cm