The Construction of a Three-Dimensional Antenna Gain Matrix and Its Impact on Retrieving Sea Surface Mean Square Slope Based on Aircraft Wave Spectrometer Data

doi:10.1175/JTECH-D-15-0095.1

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋物理与遥感研究室

	The Construction of a Three-Dimensional Antenna Gain Matrix and Its Impact on Retrieving Sea Surface Mean Square Slope Based on Aircraft Wave Spectrometer Data
	Li, Xiuzhong 1; He, Yijun 1; Zhang, Biao 1; Fan, Chenqing 2
刊名	JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
	2016-04
卷号	33 期号:4 页码:847-856
ISSN号	0739-0572
DOI	10.1175/JTECH-D-15-0095.1
英文摘要	In this study, a rotating frequency-modulated continuous wave (FMCW) radar is installed on an aircraft to retrieve the sea wave spectra. Because the aircraft attitude angles produce the incorrect antenna gain used in the radar equation, the incorrect normalized radar cross section (NRCS) of the sea surface will be acquired. To eliminate the effect of the angles, a three-dimensional matrix of the radar antenna gain is constructed by means of coordinate transformation and interpolation, based on a large set of configurations of the aircraft attitude angles (roll, pitch, etc.). With the application of the matrix, the NRCS of the sea surface is corrected and the calculating time is reduced. Then the sea surface mean square slope (MSS) is obtained from the echoes of the airborne wave spectrometer. Considering a weak periodicity of MSS due to low sea state, four images are presented to show the variation of the MSS after aircraft attitude angle correction. The results indicate that the accurate incidence angle of the antenna beam center is critical for retrieving the sea surface MSS, and that the magnitude of the MSS from three cycles of radar echoes can be changed by as much as 40% within 5 degrees of the attitude angles. Furthermore, the MSS becomes more periodic and regular after correction.
资助项目	Jiangsu Natural Science Foundation[BK2011008]
WOS研究方向	Engineering ; Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000375736000016
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3471]
专题	业务部门_海洋物理与遥感研究室
作者单位	1.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, 219 Ningliu Rd, Nanjing 210044, Jiangsu, Peoples R China; 2.State Ocean Adm, Inst Oceanog 1, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiuzhong,He, Yijun,Zhang, Biao,et al. The Construction of a Three-Dimensional Antenna Gain Matrix and Its Impact on Retrieving Sea Surface Mean Square Slope Based on Aircraft Wave Spectrometer Data[J]. JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,2016,33(4):847-856.
APA	Li, Xiuzhong,He, Yijun,Zhang, Biao,&Fan, Chenqing.(2016).The Construction of a Three-Dimensional Antenna Gain Matrix and Its Impact on Retrieving Sea Surface Mean Square Slope Based on Aircraft Wave Spectrometer Data.JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,33(4),847-856.
MLA	Li, Xiuzhong,et al."The Construction of a Three-Dimensional Antenna Gain Matrix and Its Impact on Retrieving Sea Surface Mean Square Slope Based on Aircraft Wave Spectrometer Data".JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY 33.4(2016):847-856.