A flight evaluation of the AN/APN 191 radar altimeter was conducted to determine its accuracy and suitability as a test instrument. The testing consisted of 9.7 flight hours with the altimeter system installed in a UH-1C helicopter. Results show that the AN/APN 191 altimeter system has a large random error and is not as accurate as present altitude determination methods. Therefore, this altimeter is unsatisfactory as a test instrument. The indicator scale and sensitivity were excellent; and the accuracy was not affected by attitude, vertical speed, or airspeed variations. (Author)
Flight Evaluation An/Apn 191 Radar Altimeter
1970
29 pages
Report
Keine Angabe
Englisch
NTRS | 1963
|NTRS | 1963
|Flight Test of Radar Altimeter Enhancement for Terrain-Referenced Guidance
Online Contents | 1995
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