摘要
云底高度作为重要的云宏观物理特征参数,在云层与地表之间的能量交换中起着重要作用。传统的云底高度测量方法大多基于常规观测资料,利用星载被动遥感仪器的观测数据反演云底高度在国内尚未开展。论述了基于EOS/MODIS可见光、红外数据反演云底高度的原理、方法和可行性,并结合西北某空域的飞机探测数据进行了MODIS水云云底高度反演的对比试验。初步结果表明:利用MODIS数据反演水云的云底高度是可行的;在与3次飞机穿云记录的云高真实数据对比中,反演结果平均误差为249.4 m。
Cloud base height as an important cloud macrophysical parameter, plays an important role in energy exchanges between the cloud-layer and the surface. Traditional measurements of cloud base height are mainly based on conventional data,and retrieval of cloud base height with satellite data by taking a passive remote sensing approach has not been adopted in China. Firstly, the retrieval principle, method and feasibility of cloud base height with MODIS visible infrared data are described,and the truth value on the basis of airplane measurements in northwestern China, compared with MODIS water clouds base height data. The preliminary results show that MODIS CBH retrieval algorithm is feasible to water clouds and between MODIS CBH retrieval results and the measurements from 3 airplane flights show that the mean error is about 249.4 meters.
出处
《遥感技术与应用》
CSCD
北大核心
2009年第3期341-345,I0004,I0005,共7页
Remote Sensing Technology and Application
关键词
MODIS
水云
云底高度
飞机探测
MODIS
Water clouds
Cloud base height
Airplane measurements
