NSSC OpenIR  > 微波遥感部
A Preliminary Study of the Calibration for the Rotating Fan-Beam Scatterometer on CFOSAT
Zhu, Jintai; Dong, Xiaolong; Lin, Wenming; Zhu, Di; Zhu, JT (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationIEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
2015
Volume8Issue:2Pages:460-470
ISSN1939-1404
Language英语
KeywordExternal Calibration Homogeneous Areas In-flight Calibration Internal Calibration Rotating Fan-beam Scatterometer (Rfscat)
AbstractThe first rotating fan-beam scatterometer (RFSCAT) will be launched onboard the Chinese-French Oceanic Satellite (CFOSAT) in 2018. It provides a set of radar cross-section (sigma(0)) measurements at different azimuth/incidence angles over a wind vector cell (WVC), in order to determine the near-surface wind field using the backscatter model, i.e., the so-called geophysical model function (GMF). The accuracy of the retrieved wind vector is a sensitive function of the radiometric accuracy of the sigma(0) measurements. Therefore, in-flight calibration, including the loop-back (internal) calibration and the external calibration performed with natural extended-area targets, is studied in this paper. Several homogeneous areas over land are first analyzed to check the stability and azimuthal dependence of the sigma(0) over these areas. A new calibration mask of the homogeneous land areas is generated and will be used by RFSCAT calibration. Then a simple method of external calibration is proposed to eliminate the azimuthal-dependent sigma(0) errors induced by the insertion loss of the rotating joint, which can be applied to both the rotating pencil-beam scatterometers and the coming RFSCAT. The "observed" sigma(0) of RFSCAT is simulated using the Seasat-A scatterometer (SASS) measurements and the "perturbed" azimuthal-dependent sigma(0) errors. The latter is then tracked by the proposed external calibration. The results show that the accuracy of gain corrections is up to 0.2 dB, ensuring consistency between different azimuthal measurements.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4674
Collection微波遥感部
Corresponding AuthorZhu, JT (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhu, Jintai,Dong, Xiaolong,Lin, Wenming,et al. A Preliminary Study of the Calibration for the Rotating Fan-Beam Scatterometer on CFOSAT[J]. IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,2015,8(2):460-470.
APA Zhu, Jintai,Dong, Xiaolong,Lin, Wenming,Zhu, Di,&Zhu, JT .(2015).A Preliminary Study of the Calibration for the Rotating Fan-Beam Scatterometer on CFOSAT.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,8(2),460-470.
MLA Zhu, Jintai,et al."A Preliminary Study of the Calibration for the Rotating Fan-Beam Scatterometer on CFOSAT".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 8.2(2015):460-470.
Files in This Item:
File Name/Size DocType Version Access License
201582460.pdf(2196KB) 开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhu, Jintai]'s Articles
[Dong, Xiaolong]'s Articles
[Lin, Wenming]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu, Jintai]'s Articles
[Dong, Xiaolong]'s Articles
[Lin, Wenming]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu, Jintai]'s Articles
[Dong, Xiaolong]'s Articles
[Lin, Wenming]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.