星载激光雷达探测海面风速昼夜差异研究
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- 英文论文题名：Comparison of day and night sea surface wind speed detection using CALIPSO lidar measurements
- 论文作者：孙雨辰 ; 吴东
- 英文论文作者：SUN Yu-chen ; WU Dong ; College of Information Science and Engineering ; Ocean University of China
- 年：2012
- 作者机构：中国海洋大学信息科学与工程学院;
- 论文关键词：激光技术 ; 海面风速 ; 昼夜对比 ; 精度
- 英文论文关键词：laser techniques ; sea surface wind speed ; contrast of day and night ; precision
- 会议召开时间：2012-10-15
- 会议录名称：第二届中国激光雷达学术会议论文集
- 语种：中文
- 分类号：P714.2
- 学会代码：LZZS
- 会议名称：第二届中国激光雷达学术会议
- 会议地点：中国山东青岛
- 主办单位：中国科学院合肥物质科学研究院、中国科学院上海光学精密机械研究所、中国科学院大气物理研究所、武汉大学、中国海洋大学、西安理工大学
- 学会名称：《量子电子学报》编辑部
- 页数：7
- 文件大小：1870k
- 原文格式：O
- 会议级别：全国
摘要
采用夜间数据反演海面风速已经取得较好的研究成果.由于受到太阳直射光和天空背景辐射等因素的影响,星载激光雷达信号在白天的信噪比较差.基于已有的反演关系模型,采用CALIPSO星载激光雷达532 nm通道2007年1月、4月、7月和10月的单脉冲昼夜数据,将大气气溶胶光学厚度(AOD)数据用来做大气双程透过率校正,以准同步AMSR-E v7版本的海面风速为真值,进行反演海面风速的昼夜对比研究.研究结果表明,采用白天数据反演海面风速是可行的.通过采用恰当的关系模型来反演白天风速可以提高探测精度.
For retrieving sea surface wind speed,good results were achived with CALIPSO lidar night data.During daytime,spaceborne lidar has a poor signal to noise ratio due to the irradiation of direct sunlight and the sky.Based on the existing retrieval model,sea surface wind speeds of day and night were retrieved using CALIPSO lidar 532 nm day and night single-shot data of January,April,July and October in 2007,with aerosol optical depth(AOD) for two-way atmospheric transmittance correction.The collocated version7 AMSR-E sea surface wind speeds were used as the true values for comparison.The results show that,it is feasible to use CALIPSO daytime lidar data for sea surface wind speed retrieval,and the precision can be increased with the use of appropriate retrieval model.
For retrieving sea surface wind speed,good results were achived with CALIPSO lidar night data.During daytime,spaceborne lidar has a poor signal to noise ratio due to the irradiation of direct sunlight and the sky.Based on the existing retrieval model,sea surface wind speeds of day and night were retrieved using CALIPSO lidar 532 nm day and night single-shot data of January,April,July and October in 2007,with aerosol optical depth(AOD) for two-way atmospheric transmittance correction.The collocated version7 AMSR-E sea surface wind speeds were used as the true values for comparison.The results show that,it is feasible to use CALIPSO daytime lidar data for sea surface wind speed retrieval,and the precision can be increased with the use of appropriate retrieval model.
引文
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[2]Measures R M.Laser Remote Sensing Fundamentals and Applications[M].New York:Jehn Wiley-Interscience,1984:221-223.
[3]Liu Z S,Wu D,Song X Q,et aL The performance analysis and experiment of lidar for measuring atmosphere aerosol[J].Acta Optica Sinica(光学学报),2001,1-8(in Chinese).
[4]Qiu Jinhuan,Sun Jinhui.Optical remote sensing and analysis of the sandstorm[J].Atmospheric Sciences(大气科学),1994,18(1):1-3(in Chinese).
[5]Kildal H,Byer R L.Comparison of laser methods for remote detection of atmospheric pollutants[J].Proc.of the IEEE,1971,59(12):1643.
[6]Kirt J T O.Light and Photosynthesis in Aquatic Ecosystems[M].Cambridage:Cambridge University Press,1983:14-16.
[7]Hu Y,Stamnes K,Vaughan M,et aL Sea surface wind speed estimation from space-lidar measurements[J].Atmos.Chem.Phys.,2008,8:3593-3601.
[8]Wu Dong,Zhang Xiaoxue,Yan Fengqi,et aL Sea surface wind speed detection by using the data of CALIPSO lidar[J].Acta Optica Sinica(光学学报),2012,32(8):243-249(in Chinese).
[9]Jia Jia.Sea Surface Wind Speed Inversion Based on CALIPSO Aerosol Production(基于CALIPSO气溶胶产品LIDAR信号校正的海面风速反演)[D].Qingdao:Master Thesis of Ocean University of China,2011:21-33(in Chinese).
[10]Martin S.An Introduction to Ocean Remote Sensing(海洋遥感导论)[M].Trans,by Jiang Xinwei,et al.Beijing:China Ocean Press,2008:246-267(in Chinese).
[11]Cox C,Munk W.Statistics of the sea surface derived from sun glitter[J].Journ.Mar.Res.,1954,13:198-227.
[12]Wu J.Mean square slopes of the wind-disturbed water surface,their magnitude,directionality,and composition[J].Radio Sci.1990,25:37-48.
[13]Wu Dong,Jia Jia.Global penetrability statistics of CALIPSO over ocean laser samples[J].Journal of Atmospheric and Environmental Optics(大气与环境光学学报),2011,6(4):252-259(in Chinese).
[14]Zhang Xiaoxue.Research of the Accuracy Improvement of Sea Surface Wind Speed Estimation from Space-based Lidar Measurements(提高星载激光雷达海面风速探测精度的研究)[D].Qingdao:Master Thesis of Ocean University of China,2012:14-16(in Chinese).
[15]Song Xiaoquan,Liu Zhishen,He Yan,et al.The atmospheric lidar experimental study in the daytime[J].Journal of Ocean University of China(青岛海洋大学学报),2001,31(4):590-593(in Chinese).