实时定标微波辐射计

REAL-TIME CALIBRATED MICROWAVE RADIOMETER

本文提出了一种新形式的微波辐射计,即实时定标微波辐射计。这种体制的微波辐射计具有的特点是:不受增益波动的影响,不受本机噪声变化的影响,能够提供连续的定标,动态范围宽等。制作了一台C波段实时定标微波辐射计,积分时间为0.2s,灵敏度为0.2K,线性度为0.9990,适应于地面、机载和星载微波遥感。

In this paper, a new type of microwave radiometer, real-time calibrated microwave radiometer was introduced. It has the following characteristics: (1) insensitive to system gain variations; (2)insensitive to receiver noise temperature variations; (3) the ability to provide realtime calibration; (4) wide measurement range. The prototype of real-time calibrated microwave radiometer at C -band was made in our laboratory. The integration time is 0.2s, the sensitivity is 0.2K,linearity of the receiver is 0.9990. It is adaptive for the use of ground, airborne and spaceborne microwave remote sensing.