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Proceedings Paper

AlliedSignal commercial avionics windshear radar: theory and operational experience
Author(s): Philip Hermann
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Paper Abstract

The AlliedSignal RDR-4B, a state-of-the-art digital airborne weather radar capable of forward-looking/predictive windshear detection, is presented. The weather phenomenon known as microbursts and windshears are overviewed. In reviewing the 'physics' of windshear, the need for a forward-looking sensor is established and the selection of digital radar as a means-to-the-end is justified. The RDR-4B system capabilities are then summarized, followed by a top-level breakdown of the radar and associated windshear detection processing. Key discussions include formation of Doppler frequency domain data, adaptive rejection of clutter spectra, and statistical characterization of retained weather/windshear spectra. An explanation of how these statistics come to indicate a windshear's existence and severity, in terms of hazard factors, follows. The paper concludes by documenting an actual windshear's detection prior-to-encounter and subsequent penetration by a RDR-4B equipped test aircraft.

Paper Details

Date Published: 27 May 1996
PDF: 12 pages
Proc. SPIE 2737, Air Traffic Control Technologies II, (27 May 1996); doi: 10.1117/12.241055
Show Author Affiliations
Philip Hermann, AlliedSignal Inc. (United States)

Published in SPIE Proceedings Vol. 2737:
Air Traffic Control Technologies II
Robert G. Otto; James Lenz; Russell Targ, Editor(s)

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