2013
notes on the 2013 ramp survey
130123
WFF ramp survey
N159 base station
3vt2 is vehicle, 3vyu is base station
1924 data on and moving
2020 survey complete, still
Oblique antenna height measurements for the static base station at N159:
158.8 cm
158.9 cm
158.9 cm
N159 marker: Ashtech 700939 rev D
vehicle: 701945 rev E
Antenna height measurements for the vehicle:
-New mag mount choke-ring antenna was placed on the roof of a small rented sedan
-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 on WFF ramp, with little noticeable slope
-pre-survey measurements: 169.1/168.7/170.5 cm passenger side / 168.1/168.2/169.5 cm driver side
-post-survey measurements: 169.6/169.6/169.7 cm driver side / 169.0/168.8/168.5 cm passenger side
-average pre-survey height: 169.02 cm
-average post-survey height: 169.20 cm
-overall average height: 169.11 cm
-overall average height to top of chokerings: 165.21 cm
We leveled the ground (3vyu with Ashtech choke-ring, no cone) antenna with the vehicle-mounted
mag-mount choke-ring antenna (3vt2) during the precal period. We used a tripod-mounted Bosch laser
level to measure height difference between the same physical points on both antennas. We found a
height difference of 0.77 cm, with the vehicle antenna being higher than the ground station antenna.