Mount Receiver Antenna; Measure And Record Instrument Height (Hi) Of Gps Antenna; Mount Radio Antenna; Figure 4.8 Geodetic Iv Gps Antenna On Rover Pole - ashtech Z-Xtreme System Manual

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Mount Receiver Antenna

The rover GPS antenna is mounted onto a pole that can be accurately leveled over

the feature to be positioned (Figure 4.8). The rover system will have a fixed-height

pole included for this purpose.

Remember that measurements of satellite data are made at the center (horizontally

and vertically) of the GPS antenna. The HI allows the computed position of the

antenna center to be transferred to the ground. It's critical that the HI of the antenna

above the ground is measured accurately. It can be physically measured or the HI

can be calculated based on the known fixed length of the pole plus the thickness of

the antenna from the base to the data measurement point. An HI measurement

device is included with the rover system.

In the backpack configuration, the radio antenna is mounted on a pole on the outside

of the rover backpack. The required accessories to facilitate this mounting are

included in the rover system. If the Pacific Crest PDL rover radio is used, the entire

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