A Preliminary Study of the Calibration for the Rotating Fan-Beam Scatterometer on CFOSAT
文献类型：期刊论文
| 作者 | Zhu, Jintai; Dong, Xiaolong; Lin, Wenming; Zhu, Di |
| 刊名 | IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
 |
| 出版日期 | 2015 |
| 卷号 | 8期号:2页码:460-470 |
| ISSN号 | 1939-1404 |
| 关键词 | External calibration homogeneous areas in-flight calibration internal calibration rotating fan-beam scatterometer (RFSCAT) |
| 通讯作者 | Zhu, JT (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China. |
| 英文摘要 | The 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. |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/4674]  |
| 专题 | 国家空间科学中心_微波遥感部 |
| 推荐引用方式 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.(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. |
入库方式： OAI收割
来源：国家空间科学中心
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