Accession Number : AD0830037

Title :   AIR DATA BASELINE MEASUREMENT FEASIBILITY TEST ANALYSIS.

Descriptive Note : Test rept.,

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA FIRE CONTROL DEVELOPMENT AND ENGINEERING LABS

Personal Author(s) : Rennekamp,Theodore J. ; Slook,Thomas

Report Date : SEP 1966

Pagination or Media Count : 38

Abstract : The feasibility of airborne ranging taking advantage of helicopter mobility to establish a baseline for conventional triangulation (angle-side-angle) is primarily dependent upon the accuracy with which this baseline can be provided. The baseline is the straight-line distance between two points at the time selected sightings are made to the target to establish angular data. This report describes flight test of airborne air-data equipment installed in a UH-1B helicopter designed specifically to provide measurements of such a baseline. It includes a discussion of the air-data techniques employed and the errors resulting in the measurements made during the test program. The results of all measurements taken indicate that the equipment was capable of determining the baseline under various conditions of wind and aircraft maneuver to within 4.2 percent of the baseline length. For geometrical conditions, generally assumed as optimum, errors of this magnitude will be reflected in errors of range determination of approximately the same percentage. (Author)

Descriptors :   (*RANGE FINDING, AIRBORNE), HELICOPTERS, TRIANGULATION, FEASIBILITY STUDIES, DATA PROCESSING, TARGETS, AZIMUTH, SAMPLING, WIND, TERRAIN, ALTITUDE, TRACKING CAMERAS, WIRING DIAGRAMS, TEST METHODS, SEQUENCES(MATHEMATICS), ERRORS

Subject Categories : Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE