True View 410 Hardware User Guide
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True View 410 Hardware User Guide
8/3/2020
Z OFFSET
The Z offset is the distance from the APX-15 to the GNSS antenna phase center in the up/down
direction. If the GNSS antenna is above the APX-15, the offset is negative. If the antenna is below the
APX-15, the offset is positive. The reference point for Z will be the top of the bottom aluminum
mounting plate (Figure 42) where the cameras are attached. The APX-15 is 1.644cm above this plate.
A tip for measuring Z is to install the True View and GNSS antenna on the aircraft and place it on a
table. Measure from the bottom of the antenna (Figure 43) to the table, then add 3.7cm to this
measurement. 3.7cm is the offset from antenna phase center to the bottom of the antenna. Then
measure up from the table to the aluminum plate. Subtract the distance from the table to the plate,
then subtract 1.644cm to get the distance from antenna phase center to the APX-15.
Figure 42
Figure 43