NovAtel Application Note
APN-048 Rev 3
ALIGN Application Note
page 8 of 10
3.4 Use Case 4:
Single Master with Multiple Rovers ALIGN setup (ALIGN Relative
Positioning)
This use case demonstrates one ALIGN Master and multiple Rover receivers. There is one main Master
receiver set up on one platform as a moving reference, with multiple Rovers set up on other platforms.
Figure 4 illustrates the main Master receiver on a seismic research vessel. The Rover receivers are located
in a series of buoys. Relative heading, pitch, baseline length and Rover positions are computed with
respect to the Master receiver.
Figure 4: Single Master with Multiple Rovers ALIGN setup
Manual Configuration with Wireless Data Link:
1.
Configure the wireless data links for two-way communication, using the same baud rate (i.e.,
230400bps)
2.
Connect one wireless data link to an available COM port on the Master receiver (i.e., COM2).
3.
Configure the Master receiver to output RTCA corrections at the same baud rate as the wireless data
link:
MOVINGBASESTATION ENABLE
INTERFACEMODE COM2 NOVATEL RTCA OFF
COM COM2 230400 N 8 1 N OFF ON
LOG COM2 RTCAOBS3 ONTIME 0.1
LOG COM2 RTCAREFEXT ONTIME 0.1
4.
Connect the other wireless data link to an available COM port on the Rover receiver.
5.
Configure COM2 of the Rover receiver to receive corrections and output heading information at the
same baud rate as the wireless data link:
INTERFACEMODE COM2 RTCA NOVATEL OFF
COM COM2 230400 N 8 1 N OFF ON
6.
Repeat Steps 4 and 5 until all Rover receivers are configured
7.
To access heading and relative positioning data, ALIGN logs must be logged at each ALIGN rover.
