Leica GPS1200 Series Technical Reference Manual page 96

Antenna Heights
Pillar setup
Vertical height reading
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.
GPS1200
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/AX1202 GG antenna is
shown. Vertical offset = 0
96