Comparative analysis of radiometer systems using non-stationary processes

摘要: Radiometers require periodic calibration to correct for instabilities in the receiver response. Various techniques exist that minimize effect of receivers. The optimal technique depends upon many parameters. Some parameters are constrained by particular application and others can be chosen system design. For example, measurement uncertainty may reduced limits resolution (sensitivity) if absolute performed with sufficient frequency. However period between calibrations is long, a reference-differencing technique, i.e. Dicke-type design, yield better performance. not only detection scheme but also on number pixels calibrations, integration time per pixel, reference measurement, temperature, brightness temperature what being measured. best reducing depends, large part, stability electronics. A framework evaluating schemes wide range architectures presented. Two methods treating non-stationarity compared radiometer measurements.