BendixKing IN-862A System RDR-2100 - Manual (Page 28)

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Effective Date: 9/98 RDR 2100 Pilot's Guide: Rev 1
Ground Mapping and Interpretation
GROUND MAPPING AND INTERPRETATION
A secondary objective of the radar system is gathering and presentation
of terrain data. This data is represented in the form of a topographical
map that can be employed as a supplement to standard navigation pro-
cedures. Target quality affects the indicator display in various situations.
Use of the GAIN and TILT controls will often improve picture contrast so
specific ground targets are more readily recognizable.
Over Water - calm water or water with swells does not provide good
returns. The energy is reflected in a forward scatter angle with inade-
quate portions being returned. The resulting display is “no target.”
Choppy water provides better returns from the downwind sides of the
waves. The resulting display is a target whose intensity will vary with the
degree of choppiness.
Over Terrain - Illumination of terrain results in a “diffused” reflection of the
beam. A portion of this reflected energy is scattered back toward the
antenna resulting in the prominent display of land features as well as
lakes, large rivers, shore lines and ships.
RDR 2100 PG 3/12/07 3:45 PM Page 24