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Perspective of a Ku-Ka Dual-Frequency Scatterometer for Simultaneous Wide-Swath Ocean Surface Wind and Current Measurement
Miao, Yuanjing; Dong, Xiaolong; Bao, Qingliu; Zhu, Di; Dong, XL (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.; Dong, XL (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.; Dong, XL (reprint author), Int Space Sci Inst Bejing, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationREMOTE SENSING
2018
Volume10Issue:7
ISSN2072-4292
Language英语
KeywordOcean Surface Current Surface Wind Dual-frequency Dopscat End-to-end Wide-swath High-accuracy
AbstractOcean surface wind and current are essential ocean dynamic environment and climate variables, and simultaneous observations at high resolution have attracted considerable interest. The study on surface wind and current will improve our knowledge of energy transfer between the atmosphere and the ocean, as well as the advection of heat, nutrients, and pollutants in the ocean. Since ocean surface wind and current are tightly coupled, we discuss the wind speed and direction errors effects on current, and find that current velocity is sensitive to wind speed and direction errors. Thus, it is necessary to obtain simultaneous wind field information to mitigate the effects of the wind on current retrieval. In this study, we present a Ka-Ku dual-frequency pencil-beam Doppler Scatterometer (DopScat), keeping the Ku-band for wind measurement and the Ka-band for current measurement. We establish an end-to-end simulation model to analyze the performance of the dual-frequency DopScat, and discuss the effects of satellite attitude and velocity determinations on current retrieval. The system parameters were optimized based on the simulation model. The simulation results show that the K-pc of the Ku-band DopScat is better than that of the traditional fan-beam and pencil-beam scatterometer, which is beneficial to improve wind measurement accuracy. In the Ka-band DopScat, the standard deviations (Stds) of current velocity in both along-track and cross-track directions could be smaller than 0.05 m/s, when the wind speed is larger than 5 m/s. When the wind speed is 7 m/s, the current field effective swath is 660 km, accounting for 63% of the DopScat swath, with an accuracy of 0.05 m/s. Our results indicate that the use of a Ku-Ka dual-frequency DopScat could be a feasible method for wide-swath and high-accuracy simultaneous measurements of ocean surface wind and current.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6399
Collection微波遥感部
Corresponding AuthorDong, XL (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.; Dong, XL (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.; Dong, XL (reprint author), Int Space Sci Inst Bejing, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Miao, Yuanjing,Dong, Xiaolong,Bao, Qingliu,et al. Perspective of a Ku-Ka Dual-Frequency Scatterometer for Simultaneous Wide-Swath Ocean Surface Wind and Current Measurement[J]. REMOTE SENSING,2018,10(7).
APA Miao, Yuanjing.,Dong, Xiaolong.,Bao, Qingliu.,Zhu, Di.,Dong, XL .,...&Dong, XL .(2018).Perspective of a Ku-Ka Dual-Frequency Scatterometer for Simultaneous Wide-Swath Ocean Surface Wind and Current Measurement.REMOTE SENSING,10(7).
MLA Miao, Yuanjing,et al."Perspective of a Ku-Ka Dual-Frequency Scatterometer for Simultaneous Wide-Swath Ocean Surface Wind and Current Measurement".REMOTE SENSING 10.7(2018).
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