Maretron DSM150, User Manual

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Revision 1.4.18 Page 117
The allowable values for the Antenna Altitude are between -100m and 100m. This number represents
the altitude or the GPS100, and is used to improve the quality of the position fix if only a two-
dimensional fix is obtainable. If a three-dimensional position fix is obtainable, this value is not used.
6.14.1.3 Elevation Mask
The DSM150 is capable of setting the Elevation Mask on a Maretron GPS100. You can choose this
setting by pressing the Enter key (
) with the “Elevation Mask:” menu item selected which causes
the screen shown in Figure 111 to be displayed.
Figure 111
– Configuring Satellite Elevation Mask on a GPS100
The allowable values for Elevation Mask are between -90° and 90°. This number represents the
elevation of a satellite above the horizon. Satellites with 0° elevation are at the horizon, while
satellites with 90° elevation are directly overhead. The GPS will exclude satellites with an elevation
lower than the value of this parameter from the position solution.
6.14.1.4 PDOP Mask
The DSM150 is capable of setting the PDOP Mask on a Maretron GPS100. You can choose this
setting by pressing the Enter key (
) with the “PDOP Mask:” menu item selected which causes the
screen shown in Figure 112 to be displayed.