两种星载微波辐射计被动亮温数据的交叉定标
Cross-calibration for passive microwave measurement of MWRI and AMSR-E
查看参考文献19篇
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文摘
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针对两种不同星载微波辐射计在长时间序列的变化探测研究中存在时空间差异问题,应用时空匹配交叉定标方法,选取亚马逊雨林作为高亮温地面观测目标和格陵兰地区为低亮温地面观测目标,采用原始轨道扫描数据对微波成像仪和先进微波扫描辐射计的时空上相匹配的5通道水平和垂直极化亮度温度数据进行交叉定标。研究结果表明,校正决定系数都在0.99以上,均方根误差均小于1.3 K,定标系数精确度高,匹配数据拟合程度非常好。精确的交叉定标系数,对于我国FY3号以及后续卫星等微波定标参数确定、同国外卫星的长时间序列衔接以及数据质量的评估等具有重要意义。 |
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其他语种文摘
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This paper aims at the space-time biases problems of two different spaceborne microwave radiometers in the long time series of change detection research,applying the cross-calibration method of space-time matching,selecting the tropical forest of Amazon as the high brightness temperature groundbased observation target and Greenland area as the low brightness temperature ground-based observation target,adopting the time-space matching five-channel horizontal and vertical polarization brightness temperature data using the original orbit scan data of the Microwave Radiation Imager(MWRI)and the Advanced Microwave Scanning Radiometer-Earth Observing System(AMSR-E)to perform the cross-calibrate.The results indicate that the correction coefficients of determination are above 0.99and the RMS errors of 10frequency regression equations are all less than 1.3K,demonstrating the high accuracy of scaling factor and good fitting degree of matching data.The Precise cross calibration factor is of importance in determining the microwave calibration parameters of our country’s FY3and subsequent satellites,long time series connecting with the foreign satellites and accessing the quality of data. |
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来源
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测绘科学
,2017,42(1):136-142 【核心库】
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DOI
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10.16251/j.cnki.1009-2307.2017.01.025
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关键词
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被动微波
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交叉定标
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AMSR-E
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FY3/MWRI
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长时间序列
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地址
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1.
江西理工大学建筑与测绘工程学院, 中国科学数字地球重点实验室, 江西, 赣州, 341000
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中国科学院遥感与数字地球研究所, 中国科学院数字地球重点实验室, 北京, 100094
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国家卫星气象中心, 北京, 100081
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江西理工大学建筑与测绘工程学院, 江西, 赣州, 341000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1009-2307 |
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学科
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测绘学 |
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基金
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公益性行业（气象）科研专项
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国家自然科学基金项目
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文献收藏号
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CSCD:5898723
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参考文献 共
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