used for GPS ground survey with antenna mounted on roof.
A total station is used to determine the height of the antenna
above the ground surface. Also in the center of the photo
is a GPS base station set-up.
on images to enlarge.
trajectory over calibration target. The ground GPS
survey used for calibration is overlain on the trajectory.
During this flight two reference passes were flown
parallel to the calibration road. Also note in this
figure the wide, flat turns at the end of passes.
The aircraft cannot bank more than 15 degrees, or
the GPS receiver will lose lock on satellites, causing
potential problems for the computation of the aircraft