Statistical synthesis of scanning radiometer with modulation of the desired signal

Estimates of parameters (as functions of spatial coordinates) of researched environments on their own radio thermal radiation can be received in the various ways. Systems of aperture synthesis [1, 2], mobile [2] or scanning [2-4] radiometers are being applied for this purpose. Realization of the last is interfaced to difficulties which appear in wide class of radiometric systems. The estimation of parameters significantly depends on unstability of predetection section of the receiver. These unstability are caused, mainly, by temperature fluctuations of predetection section during work of the receiver. It is possible to reduce their influence using the thermal stabilization of entrance section. But such protection increases weight and dimensional characteristics of radiometers. Refusal of thermal stabilization will demand frequent calibration of system that isn´t always useful during measurements. The solution can be found use of the modulation scheme in entrance section. Authors solved problems of statistical synthesis algorithms of signal processing in modulation radiometers [5, 6]. However application of these algorithms in the scanning radiometer will be non-optimal. The solution of the problem of statistical synthesis scanning radiometer of modulation type is the actual problem considered in the report.