Topcon HiPer VR - Page 56

Measuring Antenna Height
6-6
P/N: 1023998-01
System Setup
Any necessary antenna phase center adjustments, based on the antenna model, are automatically
applied. These adjustments, when combined with accurately measured height and measurement
methods, allow for correctly computed reference marker coordinates.
To accurately measure the antenna height, do the following:
1. Measure the antenna height above the control point or marker, either the slant height or the
vertical height. You may either measure the vertical height to the Antenna Reference Point (ARP)
located at the bottom of the receiver at the base of the mounting threads, or measure the slant
height to the Slant Height Measurement Mark (SHMM) on the side of the receiver.
2. Record the antenna height, points name, and start time in the field notes.
Figure 6-7: Antenna Height Measurement Points
R=100mm
A1 A2
ǿ ǿ
Vertical Height
Slant Height
L1 PHASE CENTER
L2 PHASE CENTER
M
SCALE 2 : 1
ARP
SHMM
A - Vertical Oset
C - Slant Oset
R - Radius of the Measurment Point
ARP - Antenna Reference Point
SHMM - Slant Height Measure Mark
ARP
SHMM