SZ-3 CMODIS 数据的质量及应用分析

中等分辨率成像光谱仪(CMODIS)具有34个光谱段,包含了从可见光、近红外、短波红外和热红外波段的波谱信息.本文结合2002年5月在北京地区开展的地面同步观测实验,对CMODIS数据质量进行了初步分析与评价,并对其在土地利用覆盖和水体污染分布监测等方面的应用效果进行了研究与分析.研究结果说明,CMODIS 数据质量达到了应用要求,可正确地反映不同地物类型的波谱响应.

AN ANALYSIS OF THE QUALITY AND APPLICATION OF THE SZ-3 CMODIS DATA

Obtained from the first Chinese medium-resolution imaging spectrometer in SZ-3 spacecraft, the data of CMODIS, with wavelength ranging from 0.4 μm to 12.5μm, contain abundant spectral information. In order to extract useful information from the data and develop their wide applications in many fields, it is necessary to evaluate their quality and analyze the prospects of their application. This paper makes a preliminary evaluation of their spectral quality by using corresponding ground data and analyzes their application in monitoring dynamic change of land cover, water quality and water pollution. The results indicate that the quality of CMODISdata is up to the standard of application, and hence CMODISdata have good application prospects in the survey of national land resources, the monitoring of water pollution, the estimation of crop yield, and the monitoring of natural disasters.