In recent years, many countries have shown a great deal of interest in using the concept of passive radar (PR) for remote surveillance and air traffic management. Companies and research institutes, such as Thales, EADS, Selex, Hensoldt, NC3A, and the Warsaw University of Technology, have developed off-the-shelf PR systems, their experimental setups, or demonstrators [1] , [2] .
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Horlbeck et al. (2024) studied this question.
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