Topcon GR-3 User Manual

GR-3 Receiver Setup and Survey
GR-3 Operator’s Manual
4-4
3. Attach the antenna to the modem antenna connector.
Figure 4-2. Connect GR-3 Receiver to Bipod
Step 2: Measure Antenna Height
The location of the antenna relative to the point being measured is
very important for both surveys in which the elevation of the points is
important and in surveys for horizontal location only. Horizontal
surveys are often larger in area than can reliably fit on a flat plane,
therefore the antenna adjustment must be done in three dimensions
and then projected onto a two dimensional plane.
The receiver calculates the coordinates of the antenna’s phase center.
To determine the coordinates of the station marker, specify the
following:
• Measured height of the antenna above the station marker
Lock
GR-3 Recevier
5/8 inch screw
Quick disconnect

Topcon GR-3 Specifications

General

Brand	Topcon
Model	GR-3
Category	Receiver
Language	English