19
Fig. 3.10.
Left: Radio link on carrier and a prism on antenna array box. Right: Robotic total station and
radio link.
GPS
The GPS needs to send out data in NMEA 0183 GGA format. However this is saved in a local
coordinate system, related to the centre of the local coordinate system set in MIRA Soft.
Place the GPS base antenna outside the investigation area.
Note!
Sometimes the distance
between the base and the rover needs to be several hundred meters during initialization.
Make all connections between the base antenna and the GPS base receiver.
Place the GPS rover antenna on the antenna box, in one of the spray mark holders (with 5-8
UNC thread, see Fig. 3.15), preferably left side in-line with the first channel and make all
connection between the rover antenna and the receiver antenna and the computer.
Examples of GPS arrangements are seen in Fig. 3.11.
Fig. 3.11.
RTK GPS set up.
3.7 Remote Control
Radio links
Base station
Rover antenna
Prism
