On the possibilities of single-antenna ionosphere sounding

A difference from the approved processing, characteristic of radars with continuous radiation is considered. Expressions are derived for an effective signal and for noise connected with switching. An analysis of these expressions makes possible a comparison with radars using continuous irradiation and with pulse modulation radars. To some degree the system considered for sounding the ionosphere with random switchings with transmission at reception is an intermediary between a system with a continuous radiation of radio waves and a pulse modulation system. In comparison with detection and ranging continuous signals, the regime considered makes it possible to reduce the number of antennas to one and to reduce the amount of noise from the direct transmission signal. This is attained at the cost of a decrease of the level of the most valid signal. In comparison with pulse modulated systems, the possibility is realized of reducing the minimum sounding distance. The magnitude of the valid signal both increases as well as decreases as a function of the station parameters.