Weather Analysis Mode: Manual Altitude - Honeywell IntuVue RDR-7000 Pilot's Manual

IntuVueRDR-7000 Weather Radar Pilot's Guide

WEATHER ANALYSIS MODE: MANUAL ALTITUDE

Manual Altitude mode is an analysis mode providing a constant
elevation slice throughout the entire 180-degree plan view. It is
called constant elevation because the elevation slice extracted from
the memory is corrected for the earth's curvature. With traditional tilt
angle settings the earth curves away from the beam farfrom the
aircraft making it difficult to exactly measure the height of a cell. The
constant elevation view provides a plan view that represents a thin
slice through the volumetric memory of weather reflectivity data. This
view is corrected for the curvature of the earth (i.e., it is a view at a
constant MSL altitude level or constant Flight Level).
The elevation slice is selected by the WX MAN control. The elevation
is selectable between zero and 60,000 feet in 1,000feet increments.
On activation of the WX MANmode, the slice at the current aircraft
altitude (rounded to the nearest 1,000feet) is chosen. The view does
not move up or down when the aircraft altitude changes. The pilot
can quickly measure the tops of cells without any calculations. By
varying the selected altitude until a cell just goes away, the cell height
can be directly read from the display.
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