【作者】 扈培信；

【导师】 王晶；

【作者基本信息】 中国海洋大学 ， 光学工程， 2011， 硕士

【摘要】 微波遥感是利用电磁波和地物微波频段特性对地面信息进行获取的一种技术手段,微波遥感的主要传感器之一微波辐射计已成功为大气及海洋等各个领域提供了大量观测数据。我国的星载微波辐射计发展较慢,目前运行的只有FY-3A/B系列卫星携带的微波成像仪。FY-3B卫星于2010年11月5日发射,为了充分认识FY-3B微波成像仪数据的性能,掌握国产微波辐射计的应用前景,本文采用星星对比方法以AMSR-E微波辐射计数据作为对比数据,开展了针对FY-3B的数据处理,亮温质量评价,海表参数反演等研究工作。本文具体研究内容及结论如下:1、完成了FY-3B微波成像仪亮温数据处理及其全球亮温分布图的生成,通过与AMSR-E对比,对FY-3B微波成像仪各通道响应地表辐射特性的能力进行了分析。结果发现FY-3B全球亮温分布图显示地面信息准确,海陆分界明显,且FY-3B和AMSR-E在不同频率及不同极化方式上的亮温响应特性一致。2、建立了渤海和黄海部分海域的FY-3B与AMSR-E亮温匹配数据集,对FY-3B亮温数据进行了定性定量的评价,结果表明FY-3B与AMSR-E各通道亮温均有线性关系,尤其在海洋上,28.7GHz、23.8GHz和36.5GHz三个波段线性相关系数在0.85以上。3、将NCEP数据作为实测数据,完成了FY-3B微波成像仪反演海面温度和风速的研究,并与AMSR-E反演结果对比,发现采用相关性强的多通道组合反演精度较高。在研究区域FY-3B和AMSR-E相同的十通道组合以及全通道组合分析中,FY-3B的亮温反演海表温度和海面风速能力都要优于AMSR-E,其中FY-3B十通道亮温反演海表温度的相关性为0.86,均方根误差为0.75℃,反演海面风速的相关性为0.79,均方根误差为1.16m/s。AMSR-E十二通道亮温反演海表温度和海面风速的结果好于十通道反演结果,相关性分别为0.84和0.78,均方根误差为0.81℃和1.18m/s。更多还原

【Abstract】 Microwave remote sensing is a technology that makes use of the feature of electromagnetic wave and microwave to get information of the Earth. Microwave radiometer-- one of the main sensors of microwave remote sensing has provided successfully a number of observations for the fields of atmosphere and ocean and so on. China’s technology in satellite microwave radiometer developed lately. At present ,there are few microwave imagers operational that are be carried on FY-3A / B series of satellites.FY-3B satellite was launched on November 5, 2010. In order to fully assess the performance of FY-3B Microwave Imager’s data, and analyze its related applications in the future, the paper has used the method of comparison between satellites,and referred to AMSR-E microwave radiometer data as the standard data. FY-3B data has been processed, then its brightness temperature assessed, finally ocean parameters been retrieved and so onThe specific contents and conclusions of this study are as follows:1、The FY-3B Radiation Microwave Imager brightness temperature data were processed and global distribution maps for the brightness temperature data were also generated, Compared with the AMSR-E data, the surface radiation response were analyzed for eachl channel of FY-3B Microwave Radiation Imager. The results showed that land information gathered by FY-3B surface brightness temperature global distribution map is accurate, the boundarie between sea and land is clear, and the brightness temperature response characteristics at different frequencies and different type of polarization are much the same between FY-3B and AMSR-E.2、Matched data set between part of the Bohai Sea and Yellow Sea were established for FY-3B and AMSR-E brightness temperature data, and the FY-3B brightness temperature data were evaluated qualitatively and quantitatively, the results show that the FY-3B and the AMSR-E brightness temperature of each channel are linear, especially in the ocean. linearly dependent coefficient for 28.7GHZ、23.8GHZ and 36.5GHZ band is above 0.85.更多还原