Relative Assessment of Safety for Radar Separation Minima Using the Close Approach Probability
1990 Volume 1990 Issue 65 Pages 15-32
Details
1990 Volume 1990 Issue 65 Pages 15-32
This paper proposes an analytical evaluation method for establishing a radar separation minimum in air traffic control (ATC) environments where a monopulse SSR (secondary surveillance radar) is used for surveillance. The SSR, namely Long Range SSR (LSSR), is supposed to be used for the surveillance of an oceanic airspace and its coverage is extended to 250 NM.
As a relative measure of the collision risk due to azimuth errors of the LSSR, the close approach probability (CAP), i.e., the probability that a pair of aircraft overlaps in azimuthal direction is used for evaluating the safety of the surveillance system. The CAPs for both the LSSR and the conventional SSR are estimated through the modeling of azimuth distribution errors. These CAPs are compared each other from statistical view points.
The results show that the CAP for the LSSR is significantly smaller than that of the conventional one under 5 NM radar separation minimum environment.
