去除EOS/MODIS 1B数据中“弯弓”效应的方法

THE METHOD OF ELIMINATING THE BOWTIE EFFECT IN THE EOS/MODIS 1B DATA

分析了中分辨率成像光谱仪EOS/MODIS的扫描方式,在此基础上研究了EOS/MODIS1B数据集“弯弓”效应的成因。对EOS/MODIS1B数据02级产品HDF文件的格式进行了探讨,并以250m分辨率资料为例,在2002年7月13日10时的MODIS资料中选取鄱阳湖以北部分地区,读取其数据进行插值、Lambert投影、重采样等处理,从而消除了影响资料使用的“弯弓”效应,同时也完成了对EOS/MODIS数据的几何校正,取得了一定的效果,为EOS/MODIS遥感资料在今后得以广泛应用作了有益的尝试。

In this paper the scan manner of the Moderate Resolution Imaging Spectroradiometer-EOS/MODIS has been illustrated. Based on it the cause of bowtie effect can be illuminated. After analyzing the format of 02 level product-HDF file of EOS/MODIS data set, the MODIS datum on July 13,2002 near the Poyang Lake is read,interpolated,Lambert projected and resampled. By these processes the bowtie effect which can affect the availability of EOS/MODIS data set is eliminated obviously, at the same time, the geometric correction of EOS/MODIS data has been finished. It is a meaningful attempt for the broad usableness of EOS/MODIS data in the future.