神舟4号飞船多模态微波遥感器地面配合试验  

Trial of SZ-4 M^3RS on the Earth

作　　者：王振占[1] 李芸[2] 谭世祥[2] 刘宝江[3] 董航[3] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100080 [2]国家海洋技术中心,天津300111 [3]中国科学院长春地理研究所,吉林长春130012

出　　处：《遥感技术与应用》2005年第1期166-172,共7页Remote Sensing Technology and Application

摘　　要：神舟4号飞船微波辐射计(RAD)是一个多波段被动微波传感器,用来测量海洋、大气和陆地表面的地球物理参数。为了对发射后RAD性能进行检验,我们于2002年底到2003年1月,在中国南海进行了神舟4号多模态微波遥感器地面配合试验。试验期间完成了微波辐射计海面同步多角度测量、海面水文气象参数测量以及大气气象探空测量。试验获得了大量宝贵的现场测试数据。对试验过程进行了简单的介绍,重点对于测量结果进行分析。同时将地面试验微波辐射计测量的结果与RAD测量的相应结果进行了比较。The multi-channel microwave radiometer (RAD) on-aboard SZ-4 spacecraft was the first space-borne microwave radiometer in China which launched at the end of 2002. In order to calibrate quantatively its performances and responses to the given targets microwave radiation, and validate the accury of its products, we carried on an in situ test which was conducted on Liuhua 11-1 oil platform from Dec 27,2002 to Jan 9, 2003. We employed a multiband microwave radiometer (MMR) operating at 6.6,13.9,19.35,22.235, and 37.0GHz, in total power mode. By rotating the horn antenna, we obtained bightness temperatures in vertical polarization, horizontal polarization, positive 45 degree linear polariztion and negative 45 degree linear polarization. This paper we first gave a general review of the experiment, then expanded the results measued by the senors, and anylysed in detail atmosphere effects on the in situ measurements for extrapolating the surface brightness temperature to the level at RAD antenna. Because the surface measurements were all collected at a certain point, while radiation RAD received were from all direction weighted by its antenna patterns, we developed an algorithm of relating boresight brightness temperature at the surface to the weighted antenna temperature at RAD antenna output. Finally, we illustrated the MMR results corrected after applied the algorithm and compared with co-located RAD measurements.

关 键 词：神舟4号飞船 微波辐射计 地面试验 

分 类 号：TP732.1[自动化与计算机技术—检测技术与自动化装置]