Maretron DSM250-01 user manual Elevation Mask, Pdop Mask

DSM250 User’s Manual

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.

6.14.1.3Elevation Mask

The DSM250 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 114 to be displayed.

Figure 114 – 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.

6.14.1.4PDOP Mask

The DSM250 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 115 to be displayed.

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