"神舟4号"飞船微波辐射计亮温反演海面温度、风速和大气水汽含量
Retrievals of Sea Surface Temperatures, Wind Speeds, Volume Water Vapor Contents From SZ-4 RAD Brightness Temperatures
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文摘
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:"神舟4号"飞船微波辐射计是我国自行研制的第一个星载被动微波遥感器.自从"神舟4号"飞船发射以后,RAD获得了大量的地球表面南北纬40°以内的不同通道的微波辐射电压数据.通过定标调整,得到地球表面的微波辐射亮温.利用同步的RAD和TMI产品数据,建立了海面温度、风速和大气水汽含量的反演算法.然后利用TMI数据产品对反演算法进行了检验.结果表明二者具有很好的一致性,在无雨的情况下,海面温度、风速和大气水汽含量的均方根误差分别为1.40℃、0.35 m/s和2.71 mm. |
其他语种文摘
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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 apply the brightness temperatures obtained by RAD, We developed an antenna pattern correct (APC) algorithms for deriving brightness temperatures from calibrated antenna temperatures for all RAD frequencies and incidence angles. A set of statistical algorithms of retrieving sea surface temperatures (SST), wind speeds (WS), volume water vapor contents (WV) above the global ocean were put forward. We compared the retrievals with geophysical products of TMI. Rms of 2. 13 C for SST, 0. 44 m/s for WS, and 2. 80mm for WV were obtained from comparing respectively. At the end of the paper, we gave a summary of comparisons. After deleting the matched data with rain, i. e , volume liquid contents above 0. 3mm, we derived SST, WS, and WV with rms of 1. 40C\0. 35m/s and 2. 71mm, respectively, which showed that rain has great effects on the retrieving these parameters, especially on SST retrievals. Genarally, Brightness temparetures by vicarious external calibration can be used for retrieving SST, WS, and WV at certain accuracy. |
来源
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遥感技术与应用
,2005,20(1):133-136 【扩展库】
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关键词
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"神舟4号"飞船微波辐射计;海面温度反演;风速反演;水汽含量反演
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地址
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1.
国家海洋技术中心, 天津, 300111
2.
中国科学院空间科学与应用研究中心, 北京, 100080
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1004-0323 |
学科
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自动化技术、计算机技术 |
文献收藏号
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CSCD:1909096
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参考文献 共
6
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