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Elevation for PPI Full and PPI Sector Scans
To set up the antenna elevation limits for a PPI Sector and PPI Full scans, enter the list of
elevation angles to be used on successive sweeps:
1. Select Elevation button to show a window containing up to 40 elevation angles and
make your selections.
2. Select Apply > Exit. (Select Clear to start over.)
When you
finish editing, the menu entry shows the number of specified tilt angles and the
minimum and maximum angles.
Azimuth for PPI Full Scans
For PPI Full scans, the Azimuth
field shows Full Circle. The antenna scanning is continuous
in azimuth.
Azimuth and Elevation for PPI Sector Scans
When a PPI Sector scan runs, the antenna scans back and forth between the azimuth limits
at a rate that achieves the requested azimuthal resolution between each processed ray. The
first sweep of the scan is performed using the first elevation angle from the elevation list; the
second sweep using the second angle, and so on.
To set up the antenna azimuth limits for a PPI Sector scan, enter the start and stop angles, in
the Azimuth field, type the limits to the nearest whole or 1/10°. The following table shows an
example of how the sector is defined clockwise from the first limit to the second limit.
Azimuth First
Limit
Azimuth Second
Limit
Description
90. 270° Scans the southern half of the radar circle.
270.0° 90. Scans the northern half of the radar circle.
Azimuth and Elevation for RHI Scans
For RHI scans, the set-up procedure is similar to PPI Sector, except that you:
Enter the start and stop limits in the Elevation field.
Enter the angle list in the Azimuth field.
The elevation limits for RHI scans are constrained by the limits specified in the setup utility.
See IRIS and RDA Utilities Guide.
Azimuth and Elevation for Manual Scans
For manual scans, the Elevation and Azimuth
fields show NA because the antenna is
controlled interactively.
Resolution
The resolution is the required spacing between successive data rays in the scanned
direction.
You can select a resolution from a menu or type the value in the field.
IRIS User Guide M211317EN-E
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