实时定标微波辐射计的仿真研究  

Simulative Study of Real time Calibrated Microwave Radiometer

作　　者：高飞[1] 张俊荣[2] 

机构地区：[1]长春光学精密机械学院计算机系 [2]中国科学院长春地理研究所微波遥感研究室

出　　处：《遥感学报》1999年第1期3-8,共6页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家863项目资助

摘　　要：实时定标微波辐射计是一种新体制的微波辐射计，它能有效地消除系统增益波动和有效本机噪声波动的影响，适合星载应用。对以全功率微波辐射计为基础的实时定标微波辐射计进行了仿真研究，建立了系统各环节的仿真模型。在仿真试验中，采用了快速离散傅里叶变换处理信号，分析并缓解了由于频程跨度大带来的频率分辨率与采样点数之间的矛盾。仿真结果为优化设计提供了重要参考，并证明所建模型准确、有效，也为进一步实现星载环境仿真调试奠定了基础。This paper presents the simulative study of real time calibrated microwave radiometer based on the total power microwave radiometer. The simulation models of every section are built. In the simulative test, the mathematical means of discrete Fast Fourier Transform is used in signal processing. The contradiction of frequency resolving power and the number samples by the large span of frequency range is analyzed and relieved. The real time calibrated microwave radiometer is a new type of microwave radiometer. It can efficiently eliminate the influence of system gain fluctuations and effective system noise fluctuations. Thus, it is more suitable to spaceborne microwave remote sensing. The simulative results in this paper give an important reference to its optimizing design. Also they lay a foundation for the advancement of realizing spaceborne environment debugging.

关 键 词：微波辐射计 实时定标 计算机仿真 微波遥感 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]