Es. Ferdinandov et Vi. Tsanev, MATHEMATICAL-MODELING OF THE APPARATUS CHANNEL OF AN INFRARED REMOTE-SENSING SYSTEM, Infrared physics, 34(5), 1993, pp. 457-466
This paper presents a mathematical model of the apparatus channel of a
n infrared remote sensing radiometric system. The latter comprises: (1
) the sounded object. This may be a medium, such as a cloud or a dense
aerosol layer caused by a temperature inversion; (2) background radia
tion; (3) the atmospheric channel, or the medium where the signal radi
ation from the sounded object and the background radiations propagate;
(4) the apparatus channel or the infrared radiometer itself. The syst
em described is useful for investigating, measuring or controlling obj
ects and media. The apparatus channel modelled is proposed as a lock-i
n detector. The joint action of all types of noise due to the stochast
ic nature of the infrared radiation or to the optoelectronic and elect
ronic conversions is discussed. The final results allow calculation of
the apparatus channel output signal-to-noise ratio.