气候变化领域集成服务门户(CCPortal): Refinement of SMOS Multiangular Brightness Temperature Toward Soil Moisture Retrieval and Its Analysis Over Reference Targets

CCPortal

DOI	10.1109/JSTARS.2014.2336664
	Refinement of SMOS Multiangular Brightness Temperature Toward Soil Moisture Retrieval and Its Analysis Over Reference Targets
	Zhao, Tianjie; Shi, Jiancheng; Bindlish, Rajat; Jackson, Thomas J.; Kerr, Yann H.; Cosh, Michael H.; Cui, Qian; Li, Yunqing; Xiong, Chuan; Che, Tao
发表日期	2015
ISSN	1939-1404
EISSN	2151-1535
起始页码	589
结束页码	603
卷号	8 期号:2
英文摘要	Soil moisture ocean salinity (SMOS) mission has been providing L-band multiangular brightness temperature observations at a global scale since its launch in November 2009 and has performed well in the retrieval of soil moisture. The multiple incidence angle observations also allow for the retrieval of additional parameters beyond soil moisture, but these are not obtained at fixed values and the resolution and accuracy change with the grid locations over SMOS snapshot images. Radio-frequency interference (RFI) issues and aliasing at lower look angles increase the uncertainty of observations and thereby affect the soil moisture retrieval that utilizes observations at specific angles. In this study, we proposed a two-step regression approach that uses a mixed objective function based on SMOS L1c data products to refine characteristics of multiangular observations. The approach was found to be robust by validation using simulations from a radiative transfer model, and valuable in improving soil moisture estimates from SMOS. In addition, refined brightness temperatures were analyzed over three external targets: Antarctic ice sheet, Amazon rainforest, and Sahara desert, by comparing with WindSat observations. These results provide insights for selecting and utilizing external targets as part of the upcoming soil moisture active passive (SMAP) mission.
英文关键词	Brightness temperature; intercomparison; soil moisture; soil moisture ocean salinity (SMOS); WindSat
WOS研究方向	Engineering ; Physical Geography ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Engineering, Electrical & Electronic ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology
WOS关键词	MICROWAVE EMISSION ; L-BAND ; MODEL ; VALIDATION ; PRODUCTS ; MISSION ; RADIOMETRY ; SURFACE ; CALIBRATION ; ALGORITHM
WOS记录号	WOS:000352277100014
来源期刊	IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/241055
作者单位	[Zhao, Tianjie; Shi, Jiancheng; Cui, Qian; Li, Yunqing; Xiong, Chuan] Chinese Acad Sci, Inst Remote Sensing & Digital Earth RADI, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China; [Zhao, Tianjie; Shi, Jiancheng; Cui, Qian; Li, Yunqing; Xiong, Chuan] Beijing Normal Univ, Beijing 100101, Peoples R China; [Zhao, Tianjie; Shi, Jiancheng; Cui, Qian; Li, Yunqing; Xiong, Chuan] Joint Ctr Global Change Studies, Beijing 100875, Peoples R China; [Bindlish, Rajat; Jackson, Thomas J.; Cosh, Michael H.] ARS, HRSL, USDA, Beltsville, MD USA; [Kerr, Yann H.] Ctr EtudesSpatiales Biosphere CESBIO, F-31401 Toulouse, France; [Che, Tao] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Tianjie,Shi, Jiancheng,Bindlish, Rajat,et al. Refinement of SMOS Multiangular Brightness Temperature Toward Soil Moisture Retrieval and Its Analysis Over Reference Targets[J]. 中国科学院西北生态环境资源研究院,2015,8(2).
APA	Zhao, Tianjie.,Shi, Jiancheng.,Bindlish, Rajat.,Jackson, Thomas J..,Kerr, Yann H..,...&Che, Tao.(2015).Refinement of SMOS Multiangular Brightness Temperature Toward Soil Moisture Retrieval and Its Analysis Over Reference Targets.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,8(2).
MLA	Zhao, Tianjie,et al."Refinement of SMOS Multiangular Brightness Temperature Toward Soil Moisture Retrieval and Its Analysis Over Reference Targets".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 8.2(2015).