Configuring Trawl Positioning System
When you have a system with door spread sensors with position data or slant ranges, you need to complete the positioning page to get accurate measurements of the door positioning.
Before you begin
- Door sensors are already added and configured.
Tip: A spreadsheet is available on the Useful
Resources page of Marport support website to help you complete this
page.
Procedure
-
From the left side of the screen where the system is displayed, click
Positioning.
The positioning configuration page appears.The page is different depending on the receiver firmware version:Figure 1. Receiver firmware below version 08.01 Figure 2. Receiver firmware from version 08.01 -
In Baseline, enter the
baseline distance and the misalignment angles:
- Enter the distance between the two receiving hydrophones in Baseline length.
-
Receiver firmware below version 08.01: You can complete the
misalignment X and Z, for more accurate positioning. See Calculations for Positioning System. Otherwise, you can enter 0. Enter 0 for the misalignment Y.
- Receiver firmware from version 08.01: Enter the misalignment angle shown on the drawing.
Note: The baseline is very important to have accurate positions of the doors. -
Receiver firmware below version 08.01: In Lever Arm, leave 0 in the fields.
-
In Inputs, enter the port and
starboard hydrophones, according to the hydrophone configuration.
Note: If you have not given a port/starboard location to hydrophones when configuring them, you need to go back to hydrophone configuration page. -
Receiver firmware below version 08.01: In Algorithm, select Compensate if you entered misalignment values in Baseline.
- Click Apply.