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PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
Introduction
1-1
1. Introduction
The PRIMUS
R
880 Digital Weather Radar System is a lightweight,
X-band digital radar with alphanumerics designed for weather detection
(WX) and ground mapping (GMAP).
The primary purpose of the system is to detect storms along the
flightpath and give the pilot a visual indication in color of their rainfall
intensity and turbulence content. After proper evaluation, the pilot can
chart a course to avoid these storm areas.
WARNING
THE SYSTEM PERFORMS THE FUNCTIONS OF
WEATHER DETECTION OR GROUND MAPPING. IT SHOULD
NOT BE USED NOR RELIED UPON FOR PROXIMITY
WARNING OR ANTICOLLISION PROTECTION.
In weather detection mode, storm intensity levels are displayed in
four bright colors contrasted against a deep black background.
Areas of very heavy rainfall appear in magenta, heavy rainfall in red,
less severe rainfall in yellow, moderate rainfall in green, and little or no
rainfall in black (background). Areas of detected turbulence appear in
soft white. The antenna sweep position indicator is a yellow bar.
Range marks and identifying numerics, displayed in contrasting colors,
are provided to facilitate evaluation of storm cells.
Select the GMAP function to optimize system parameters to improve
resolution and enhance identification of small targets at short ranges.
The reflected signal from ground surfaces is displayed as magenta,
yellow, or cyan (most to least reflective).
NOTE: Section V, Radar Facts, describesa varietyof radar operating
topics. It is recommended that you read Section V, Radar
Facts, before learning the specific operational details of the
PRIMUS
â
880 Digital Weather Radar System.