OVERVIEW: A Doppler Navigation/Weather radar system provides aircraft with ground speed, drift, and weather detection capabilities using Doppler shift and reflectivity analysis. It supports both navigation and meteorological awareness in tactical and transport missions.

GENERAL DESCRIPTION: This radar type operates by transmitting microwave pulses and measuring the frequency shift of the returned signal caused by motion relative to the ground or by reflecting off precipitation. In navigation mode, it offers velocity and drift angle data for dead-reckoning positioning, especially useful in GPS-denied environments. In weather mode, it provides detection of precipitation intensity, turbulence, and storm cells, enabling route adjustments. Installed primarily in transport aircraft, maritime patrol aircraft, and helicopters, Doppler radars enhance both situational awareness and flight safety.

ROLE SUMMARY:
Category: Navigation/Weather Radar
Primary Use: Ground speed and drift estimation, weather detection
Function: Dual-mode operation—navigation and meteorological awareness
Platform: Tactical transports, maritime patrol aircraft, SAR helicopters
Integration: Often paired with inertial navigation systems, flight management systems
Radar Type: Pulse-Doppler
Modes: Navigation mode (ground velocity/drift), Weather mode (precipitation mapping)

See Specific information under [Sensors/EW] section.

SOURCE:
U.S. Air Force and U.S. Navy Navigation System Handbooks
https://en.wikipedia.org/wiki/Doppler_radar