Figure 4.3 Conventional And Fixed-Height Tripods - Thales Z-Max Operation And Application Manual

Figure 4.3 Conventional and Fixed-Height Tripods

4. Attach HI Measurement Plate and Tribrach Adapter
Insert the brass tribrach adapter through the hole in the HI Measurement
Plate and screw the adapter/plate into the 5/8" threaded receptacle in the
bottom of the Z-Max GPS Receiver Module.
5. Mount the GPS Receiver Module on the tripod
Once the tripod is accurately centered and leveled over the point, and the
tribrach adapter and HI Measurement Plate are attached to the GPS Receiver
Module, carefully place the assembly into the tribrach mounted on the tripod
over the point).
6.Measure and record instrument height (HI) of GPS antenna
Remember that the measurement of satellite data is made at the center
(horizontally and vertically) of the GPS antenna. Yet the location of the point
to be surveyed is not at the center of the antenna but below it on the ground.
The HI allows the computed position of the antenna center to be transferred
Survey Preparation and Execution 127