Among a number of tasks in determining the shape and size of the detection area of air objects by surveillance radars most complicated is determining the configuration of the upper border because of the impossibility of the flight at an altitude of several tens of kilometers. Known analytical methods for calculating the detection areas of air objects by surveillance radars determines mostly potential possibilities of radars and independently in application practice is not used because of the impossibility of keeping a large number of random factors that affect the results of the calculations. A more affordable option is a combination of the analytical calculation methods for determining the detection areas of air objects with a limited number of experimental tests which are carried out by overflight special aircrafts or scheduled airplanes. Thanks to this combination upper-bound of the area can be calculated from the experimental data obtained by the flight at a predetermined height by dedicated aircraft or according to data obtained by tracking scheduled airplanes where the altitude is previously known. Determining the upper limit of the detection area of air objects is carried out by analyzing the amplitude of the received echo-signals in the process of tracking specific aircrafts or scheduled airplanes.
surveillance radars, detection area of air objects, flight, test