Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 67)

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2. Set-up and Connection Technical Reference Manual-4.0.0en
2. Tripod Setup
VO
VR
MRP
VE 1 VE 2
VO Vertical Offset
VR Vertical Height Reading
VE1
Vertical Phase Center Eccentricity for L1.
VE2 Vertical Phase Center Eccentricity for L2
MRP Mechanical Reference Plane
Although an AT501/502 Antenna is shown, the same principles apply to the
AT504 and AT303.
The Vertical Height Reading (VR) value is measured using the Height Hook.
The Vertical Offset (VO) value is stored in the Antenna Setup record and for a
Tripod Setup with the Height Hook as shown is 0.36m. This will need to be
measured if you are entering a new Antenna Setup Record without using the
Height Hook. There are two methods for mounting Leica Antennas - using a
GRT46 with a 5/8 inch screw or using a GRT44 with stub and a GAD31 stub to
screw adapter. The VO value remains constant whichever setup is used.
The Vertical Phase Center Eccentricities are stored in the Receiver for all
Leica System 500 Antennas and any non-Leica Antenna that you define. As
long as the correct antenna is chosen there is no need to enter any value into
the Receiver. These values do need to be calculated when a new type of
Antenna that does not exist in the Antenna Setup Records is used.