物理学报Issue(7)：1-9,9.DOI:10.7498/aps.64.079501
无云情况下L波段微波辐射计快速大气校正方法
A rapid atmospheric correction model for L-band microwave radiometer under the cloudless condition
摘要
Abstract
Atmospheric correction is very important to the accurate retrieval of geophysical parameters from spaceborne L-band radiometers. In this paper, the L-band upwelling and downwelling radiation brightness temperature and transmittance above sea surface are calculated using the atmospheric radiation transfer model based on NCEP temperature and humidity profile data. A regression model, i.e., radiation-vapor model, is established to describe the relationship between the three atmospheric radiation parameters and the atmospheric water vapor content as well as the sea surface pressure. Using this model, the atmospheric radiation parameters can be calculated and used to correct the atmospheric effects in L-band microwave radiometer observation. In order to test the proposed model, the atmospheric radiation parameters are calculated by this model and compared with the SSM/I water vapor content data and the NCEP surface pressure data. Finally, the model outputs are compared with the Aquarius satellite data. Results indicate that the radiation brightness temperature calculated by the proposed model is lower than the Aquarius data about 0.335 K and the root-mean-square error between them is about 0.086 K after correcting the systematic errors. The atmospheric transmittance calculated by the proposed model agrees well with the Aquarius data. Besides, the proposed model uses fewer input data and is faster and more stable than other existing models.关键词
L波段/微波辐射计/大气辐射传输/大气校正Key words
L-band/microwave radiometer/atmospheric radiation transfer/atmospheric correction引用本文复制引用
杜延磊,马文韬,杨晓峰,刘桂红,于暘,李紫薇..无云情况下L波段微波辐射计快速大气校正方法[J].物理学报,2015,(7):1-9,9.基金项目
国家自然科学基金(批准号:41371355)资助的课题 （批准号:41371355）
