Measurement and Analyses of ASR-4 System Error. Part II: Analyses.
Interim rept. Dec 69-Mar 70,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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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
- Air Navigation and Guidance