摘要
提出一个能对反演效果进行定量评估的指标,此指标定义为大气可反演指标.以这个指标为标准,针对目前应用最广泛的物理反演方法,提出合理有效的通道选择方案.该方案可充分考虑各种因子对反演结果的影响,以保证利用选择出的通道进行反演后精度能达到最优.最后以红外大气探测干涉仪为例,进行了两组通道选择试验,试验结果表明利用该方法进行通道选择是可行的.
The concept of atmospheric retrievable index （ARI） is introduced to provide the criterion for channel selection. The definition of ARI is given by 1 min the ratio of the determinant of the covariance matrix of the error of the results and the covariance matrix of the error of the background, and the value is within the interval between 0 and 1. For all the probable subsets, the one giving the greatest ARI is the subset to be selected. To illustrate the implementation and effect iveness of the method, two series of channel selection experiments of IASI for retrieval atmospheric temperature and humidity profiles using physical retrieval method are carried out. The results of the experiments show that the method can provide an effective approach to the channel selection for the application of high spectral resolution data.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第12期7685-7692,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:40775023
40505005)
中国人民解放军理工大学博士科研启动基金
江苏省气象灾害重点实验室基金(批准号:KLME0606)
国家重大公益性技术前期预研基金(批准号:GYHY200806029)资助的课题~~
关键词
高光谱分辨率资料
通道选择
大气可反演指标
high spectral resolution data, channel selection, atmospheric retrievable index
