Azimuth Dependent Elevation Cutoff dialog

This dialog appears if you do the following:

• Add the GNSS Receiver module to the system or change its properties, go to the Receiver Control category of settings, then set the focus onto the Azimuth dependent cutoff value field and click the browse button.

Use the Azimuth Dependent Elevation Cutoff dialog to view and edit elevation cutoff depending, for example, on current multipath values.

The main area of the Azimuth Dependent Elevation Cutoff dialog shows a polar skyplot with the current elevation cutoff mask in blue and, optionally, the current multipath tracks. It resembles the module's Multipath view.

The plot is North-orientated: The upward vertical axis points to North. Center of the circles is the zenith (elevation angle 90°) and the outer circle shows elevation 0° (the horizon).

Displaying multipath values

By default, the Show multipath plot check box is selected, that is, the polar plot displays the current multipath values from the L1/CA code. The legend below the main area associates colors with multipath values; additionally, the maximum multipath value is displayed numerically. Thus, you can easily decide whether to exclude data for specific areas from realtime processing.

Setting the elevation cutoff mask

For setting the elevation mask, do the following:

1. If you want to see areas with high multipath, make sure the Show multipath plot check box is selected.
2. Left-click anywhere within the circle of the elevation cutoff line. On the first click, three blue-colored markers appear: one at the position where you clicked onto the graph, the two others are positioned besides it on the default elevation cutoff line.
3. Drag the marker to a new position inside the circle. The elevation mask line follows your action.

   Tip - It is not possible to drag the elevation mask line below the value specified by the modules Elevation cutoff setting.

4. Repeat steps 2 and 3 as often as is needed to increase the elevation cutoff for certain azimuths. On each further click, one additional marker is added.
5. Optional: For removing a marker, right-click onto it. The two adjacent markers will be connected by the elevation mask line.

Tip - If you remove the check mark from the Show multipath plot check box, the reaction time of the dialog UI will be much faster.

Viewing values and setting to the default values

If you hover the cursor over one of the blue markers, a tooltip displays the azimuth and elevation setting this marker represents.

If you want to return to the default, that is the minimum elevation cutoff for all azimuths, in one step, click Set to Default. This removes all user-defined markers.