What do I need for GPS?
You need al least one person equipped with a GPS antenna and a receiver.
Figure 3.1: GPS Equipment
The type of survey you are performing decides over how many receivers and antennas you need.
The equipment price and the survey expense are raising along with higher accuracy demands. The accuracy of GPS reaches from 100 meters to subcentimeters:
Single receiver (walking): ± 100 m
Receiver using differential corrections (Navigation): 1 m - 5 m
Geodetic Surveying: mm - cm
Author: Michael Schulz, GEOSOFT