| 太阳对SMOS卫星海表亮温偏差年际变化的影响 |
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| 引用本文： | 殷晓斌,王振占.太阳对SMOS卫星海表亮温偏差年际变化的影响[J].遥感学报,2013,17(5):1049-1059. |
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| 作者姓名： | 殷晓斌 王振占 |
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| 作者单位： | 中国科学院 空间科学与应用研究中心, 北京 100190;中国科学院 空间科学与应用研究中心, 北京 100190 |
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| 基金项目： | 国家自然科学基金(编号: 41076117);中国科学院"优秀博士学位论文、院长奖获得者科研启动经费专项基金 |
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| 摘 要： | 利用欧洲空间局发布的土壤湿度和盐度卫星最新版本V5.04及V5.05的2010年5月至2012年4月的L1C级亮温数据,分析了其2维视场中存在的亮温偏差和年际变化。亮温偏差在视场中的分布不均匀并随季节变化。其年际变化超过1 K。太阳及其尾迹在视场中的位置随季节变化并对该卫星测量的亮温产生影响,是亮温偏差年际变化的主要来源。另外,太阳高度角的季节性变化会使该卫星天线的物理温度产生季节性变化,并通过天线模型使其测量亮温产生季节性偏差。
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| 关 键 词： | 亮温偏差 季节变化 海表面 天线温度 太阳修正 |
| 收稿时间： | 9/4/2012 12:00:00 AM |
| 修稿时间： | 2012/12/12 0:00:00 |
Effect of the sun on biases in SMOS brightness temperature over ocean surfaces |
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| YIN Xiaobin and WANG Zhenzhan.Effect of the sun on biases in SMOS brightness temperature over ocean surfaces[J].Journal of Remote Sensing,2013,17(5):1049-1059. |
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| Authors: | YIN Xiaobin and WANG Zhenzhan |
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| Institution: | Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Up-to-date Soil Moisture and Ocean Salinity (SMOS) level 1C (L1C) Brightness Temperatures (TB), which are processed with the operational prototype V5.04 and V5.05, are used to analyze the systematic biases between averaged TB measurements and simulations in Fields of View (FOV) from May 2010 to April 2012. The peak-to-peak variations in the biases are higher than 1 K in magnitude. Sun contaminations, including sun alias and sun tails, are strong sources of bias variations in the FOV. The sun correction in the level 1 (L1) image reconstruction is imperfect. By using the antenna model in L1, seasonal variations in the biases and the heating of the instrument are observed. |
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| Keywords: | brightness temperature biases temporal variation ocean surface antenna temperature sun correction |
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