The radiometric survey time

Possibility of passive detection of various objects in outer space, in the Earth´s atmosphere, or on the Earth´s surface has been demonstrated many times. However, useful results for passive detection may be obtained only by employing high-sensitivity receivers, scanning or multi-beam antennas of large area, effective survey algorithms, and statistical decision rules. The most important characteristics of a passive detection system are its range and survey time. The goal of this paper is to show the correlation between the parameters of a single-beam passive system for the observed object and the survey time. Minor factors are not taken into account in the paper