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MODIS多光谱云相态识别技术的应用研究
THE APPLICATION OF CLOUD PHASE RECOGNITION BY MODIS SPECTRAL DATA
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摘要: 介绍了卫星多光谱云相态识别的基本原理, 并给出了EOS/ MODIS云相态识别的流程。针对简单和复杂云场, 利用个例并结合无线电探空资料与MODI S三通道合成图肯定了多光谱云相态识别的合理性和实际效果。文中对几个特定天气系统(西南涡旋和西太平洋台风)下大面积云场相态分析的结果表明:多光谱云相态识别技术有一定应用价值, 且需要引入可见光技术来减少红外谱段对多层云覆盖和薄卷云的相态分析误差。Abstract: The basic principle of MODIS multispect ral cloud phase recognition is introduced, with the algorithm for cloud phase recognition investigated.Radiosonde observations and MODIS tri-channel composite images are used in the paper to show the rationality and the effect of cloud phase recognition in cases.The analysis of large cloud scenes in some special weather background indicates that the technique of multispectral cloud phase retrieval is quite steady to be applied in practice and some visible techniques should be imported to reduce the error which is unavoidable in the analysis of multilayer mask and thin cirrus with inf rared technique.
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Key words:
- Cloud Phase;
- Trispectral;
- MODIS
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