双模态微波遥感器的研制  

The Development of a Double Mode Microwave Sensor

作　　者：张德海[1] 张俊荣[1] 张升伟[1] 赵凯[1] 

机构地区：[1]中国科学院长春地理研究所微波遥感室

出　　处：《遥感学报》1999年第2期103-106,共4页NATIONAL REMOTE SENSING BULLETIN

摘　　要：散射计和辐射计是微波遥感信息获取的重要遥感器。文中提出了利用公共高频通道将散射计与辐射计组合成散射辐射计的设计思想，作者根据该思想研制成功了Ｘ波段散射辐射计。文中给出了该散射辐射计的工作原理、工作时序及性能指标。通过野外测量实验证明。Microwave remote sensing information includes active and passive microwave remot e sensing information. Under some conditions, they usually show different chara cteristics of the same object. So acquiring active and passive microwave remote sensing information simultaneously is very important to interpretation, decision and inversion of microwave remote sensing. Scatterometer and radiometer are important sensors for microwave remote sensin g information acquisition. A scattero radiometer composed of a scatterometer an d a radiometer can measure backscattering coefficient and brightness temperature of the same object simultaneously and it is superior in size, weight and operati on. In the paper, the design idea of a scattero radiometer is put forward. In the i dea, a public antenna and a public high frequency channel are used to receive sc attering and radiation signals at the same time. Then, the signals are separate d by filters in intermediate frequency and processed respectively. An X band sca ttero radiometer is developed according to the idea. A simple continuous wave s catterometer and a digital gain compensation microwave radiometer are adopted i n the scattering and radiation mode respectively. The fundamental diagram and th e timing program of the scattero radiometer are introduced. The performance of the receiver has been tested and the results are given. Scattering and radiati on characteristics of soil versus water content have been measured with the sca ttero radiometer. The results have been compared with the analogous results ac hieved aboard and the trends are the same. It shows that each mode of the scatte ro radiometer can work in sequence and they don't disturb each other. It prove s that it is feasible to develop a scattero radiometer according to the idea

关 键 词：散射-辐射计 散射计 辐射计 微波遥感器 遥感 

分 类 号：TP732.1[自动化与计算机技术—检测技术与自动化装置] TP722.6[自动化与计算机技术—控制科学与工程]