10
The positioning system used needs to communicate the positioning data in XYZ- format for Total
Station and in NMEA 0183 GGA for GPS, so that the data acquisition software MIRASoft can read it
and connect it correctly to the measured GPR swaths.
Total station:
A self-tracking total station is locked on and follows a prism mounted on the antenna
array when the MIRA system moves in the investigation area and a radio link communicates the data
from the Total station to the MIRASoft. See Fig. 2.9. The Total station should be of ATS type.
Fig. 2.9.
A self-tracking Total station is used to position the MIRA array.
RTK GPS:
A base station is established in the investigation area, while the rover antenna is mounted
on the antenna array. A radio link communicates the positioning data to MIRASoft. An example base
station is shown in Figure 2.10.
