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Effect of the sun on biases in SMOS brightness temperature over ocean surfaces
Alternative Title太阳对SMOS卫星海表亮温偏差年际变化的影响
YIN Xiaobin; WANG Zhenzhan; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication遥感学报
2013
Volume17Issue:5Pages:1049-1059
ISSN1007-4619
Language英语
KeywordBrightness Temperature Biases Temporal Variation Ocean Surface Antenna Temperature Sun Correction
AbstractUp-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.
Other Abstract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。
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/2079
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
YIN Xiaobin,WANG Zhenzhan,北京8701信箱. Effect of the sun on biases in SMOS brightness temperature over ocean surfaces[J]. 遥感学报,2013,17(5):1049-1059.
APA YIN Xiaobin,WANG Zhenzhan,&北京8701信箱.(2013).Effect of the sun on biases in SMOS brightness temperature over ocean surfaces.遥感学报,17(5),1049-1059.
MLA YIN Xiaobin,et al."Effect of the sun on biases in SMOS brightness temperature over ocean surfaces".遥感学报 17.5(2013):1049-1059.
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