Abstract
Secondary Surveillance Radars (SSR) have been employed substantially in both military and civilian domains. In military applications, the SSR technology has been used for distinguishing between friendly and hostile targets. In civilian applications, the SSR technology has been implemented in air traffic control (ATC) and collision avoidance between airplanes. Today, the majority of civilian airplanes have been equipped with Automatic Dependent Surveillance - Broadcasting (ADS-B) transponders for reporting their identity, position, velocity and additional information. Traditional methods for tracking multiple civilian airplanes consist of detecting ADS-B preamble pulses, decoding ADS-B waveforms and parsing ADS-B messages. In this paper, we provide an alternative solution for passive tracking of multiple civilian airplanes using Time Difference of Arrival (TDOA) localization of mode-S signals. Though being more complicated than classical methods, the proposed solution provides numerous advantages such as the ability to track a larger number of targets and the robustness to jamming attacks.
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