SIGNAL EXTRACTION THROUGH BACKGROUND NOISES IN A SCANNING IR PHOTOMETER

A method for eliminating the effect of background noises on the operat ion of a scanning IR photometer is described. It consists of connectin g the Ir photometer's electronic channel to photodetectors only for th e time required for scanning the working field of view. When scanning the total field of view (which exceeds the working field and has an ap propriate selection of the lower boundary frequency of separating circ uits), the transient process terminates by the moment that corresponds to the beginning of the working field of view. After this process is over, a valid signal is extracted. The efficiency of the technique for time separation of valid and background-noise signals at a background -to-noise ratio of 4 x 10(2) is demonstrated by the observation of the Mir orbital station.