NASA Technical Reports Server (NTRS) 19910014836: Saberliner flight test for airborne wind shear forward looking detection and avoidance radar systems

40 Pages·1.3 MB·English

by  NASA Technical Reports Server (NTRS)

N91-24149
Sabreliner Flight Test
for
Airborne Windshear Forward Looking Detection and Avoidance
Radar Systems
Bruce D. Mathews
Senior Engineer
Westinghouse Electric Co.
Electronic Systems Group
Radar Systems Engineering
Baltimore, Md.
Abstract
An important aspect in the design of an airborne radar for low level
windshear avoidance is the false alarm/alert rate. To be used and trusted by
pilots, any indications and/or displays of false hasards must be infrequent. A
'clean scope' design aims to preserve detection performance and eliminate
distracting false alarms. For lookdown radar, urban discretes and ground moving
vehicle traffic dominate the false alarm design problem. Depending upon their
relative location, spatial extent, and relative amplitude, these returns will
compete with microburst windehear observables and may furnish false alarm
candidates.
Westinghouse conducted a flight test with its Sabreliner AN/APG-88
instrumented radar to assess the urban discrete/ground moving vehicle clutter
environment. Clideslope approaches were flown into Washington National, BWI, and
Georgetown, Del. airports employin E r_dar mode timing, w_veform, and processing
confiEuration plausible for microburst windshear avoidance. The perceptions,
both general and specific, of the clutter environment furnish an empirical
foundation for begining low false alarm detection algorithm development.
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