Accession Number : AD0766609

Title :   Measurement and Analyses of ASR-4 System Error. Part II: Analyses.

Descriptive Note : Interim rept. Dec 69-Mar 70,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Busch,Allen C. ; Bradbury,Paul W.

Report Date : AUG 1973

Pagination or Media Count : 152

Abstract : The positional accuracy of aircraft radar targets as displayed in an Air Trafffic Control airport surveillance radar system (ASR-4) was sought as one of the inputs essential for determining aircraft separation standards. Using inputs from the Atlantic City (N.J.) ASR-4, the radar targets of two test aircraft were photographed as displayed in both primary and beacon modes on scan-converted and PPI displays. The displayed positions were related to simultaneous precision track from single-target instrumentation radars (EAIR and TAIR) to derive error measures for range, azimuth, and separation. The analysis program employed a least squares analysis of variance on some 17 response variables for a set of six system control variables. The data clearly demonstrated the strong interdependency of the individual components that contribute to radar system separation error by the presence of positive correlation coefficients and frequent statistically significant F ratios for the main effects of the six control variables. Furthermore, it was noted that the tails of the distribution of the radar separation error response measure were not normally distributed. (Author)

Descriptors :   (*AIRPORT RADAR SYSTEMS, RELIABILITY(ELECTRONICS)), (*AIR TRAFFIC CONTROL SYSTEMS, AVIATION SAFETY), ERRORS, SEARCH RADAR, RADAR TARGETS, DISPLAY SYSTEMS, PATTERN RECOGNITION, DATA PROCESSING

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE