ABSTRACT
Mapping of secondary surveillance infrastructure using time-based analysis of transponder replies may provide up-to-date information in terms of number of operating radars in area and their rotation periods. This may be key data for various recent RF 1090 MHz saturation models and studies. Nevertheless, the times of radar-solicited reply arrivals may deviate from periodic patterns due to the aircraft motion. Recognition of such patterns in the recorded mixture of replies to different radars is thus more complicated. The aim of the paper is to propose a method for evaluating arrival time irregularities due to aircraft motion that may be a limiting factor. Hence, it may contribute to development and calibration of the secondary radar detection algorithms using time-based analysis of transponder reply mixtures.
