User's Manual Part 1

60 OEMV Family Installation and Operation User Manual Rev 5B

Chapter 4 Operation

4.3 Transmitting and Receiving Corrections

Corrections can be transmitted from a base station to a rover station to improve position accuracy. The

base station is the GNSS receiver which is acting as the stationary reference. It has a known position

and transmits correction messages to the rover station. The rover station is the GNSS receiver which

does not know its exact position and can be sent correction messages from a base station to calculate

differential GNSS positions. An example of a differential setup is given in Figure 16 below:

Figure 16: Basic Differential Setup

Reference Description

1 A ProPak-V3 receiver for the rover station

2 NovAtel GNSS antenna

3 User-supplied data storage device to COM1

4 User-supplied power supply

5 User-supplied radio device to COM2

6 A ProPak-V3 receiver for the base station

7 User-supplied laptop/PC, for setting up and monitoring, to COM1

 See also Appendix C, Ethernet Configuration starting on Page 189 for the Bluetooth (default)

and Ethernet configuration options.

Errors can be introduced by system biases, as described in Section 5.1.1, GPS System Errors on Page

77. In most cases you need to provide a data link between the base station and rover station (two

NovAtel receivers) in order to receive corrections. SBAS and L-Band corrections can be

accomplished with one receiver and are exceptions to the base/rover concept. Generally a link capable

12V

Base

Rover