ACR Electronics AIS LINK2AIS - REV D Manual page 13

2. Maintenance
This menu contains rarely used items. It is turned off by default. This menu can be turned on in the program settings
dialog by entering the expert mode. Most of the menu items are only of interest to a trained technician.
GPS Satellite Position
The figure below represents a two-coordinate system with the numbers on the outside representing the standard
coordinates of a compass rose.
The degrees of declination coming from the outer ring coordinates rise from each horizon to 90° being directly over head.
The filled circles represent the satellites with the satellite number inside the circle. The satellites actually used for
computation are shown in a different color (see legend on the graph). It is normal to display a combination of used and
unused satellites. The colors can be changed in the program settings menu to your taste.
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Y1-03-0223 Rev. D