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Pillar setup
Vertical height reading
Antenna Heights
a
GPS12_031
The vertical height reading is the height difference between the pillar benchmark and the
mechanical reference plane of the antenna. Normally, it is determined indirectly by levelling.
c
b
d
a) Mechanical reference plane
b) Vertical phase centre offset for L1
c) Vertical phase centre offset for L2
d) Vertical height reading
An AX1201/AX1203+ GNSS antenna is
shown. Vertical offset = 0
GPS1200+
96
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