Perspective of a Ku-Ka Dual-Frequency Scatterometer for Simultaneous Wide-Swath Ocean Surface Wind and Current Measurement

	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.
刊名	REMOTE SENSING
	2018
卷号	10 期号:7
关键词	Ocean Surface Current Surface Wind Dual-frequency Dopscat End-to-end Wide-swath High-accuracy
ISSN号	2072-4292
英文摘要	Ocean 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.
语种	英语
资助机构	National Key Research and Development Program of China [2016YFC1401002]
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6399]
专题	国家空间科学中心_微波遥感部
通讯作者	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.
推荐引用方式 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).