| 地形对高山区TM积雪定量遥感的影响 |
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| 引用本文： | 李新,陈贤章,程国栋.地形对高山区TM积雪定量遥感的影响[J].遥感技术与应用,1997,12(1):1-7. |
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| 作者姓名： | 李新 陈贤章 程国栋 |
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| 作者单位： | (中国科学院兰州冰川冻土研究所 兰州 730000) |
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| 摘 要： | 高山区积雪的辐射特性受到高度迅速变化和地形强烈分异的显著影响,必须对图像进行辐射纠正和地形纠正以得到标准化的图像。利用大气纠正模型和对太阳辐照入射度的模拟,在高精度数字高程模型和实验区气象观测资料的支持下,通过计算光谱反射比而实现地形标准化,是一条行之有效的方法。这一方法在天山乌鲁木齐河上游冰川区得到了实际检验,被证明是实现积雪定量遥感,提高积雪区地物分类精度的重要前提。并对这一方法的局限性进行了讨论。
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| 关 键 词： | 地形标准化 大气纠正 积雪定量遥感 |
| 收稿时间： | 1996-11-04 |
The Influence of Terrain to Quantitative Remote Sensing of Snow Using TM Image |
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| LI Xin CHEN Xianzhang CHENG Guodong.The Influence of Terrain to Quantitative Remote Sensing of Snow Using TM Image[J].Remote Sensing Technology and Application,1997,12(1):1-7. |
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| Authors: | LI Xin CHEN Xianzhang CHENG Guodong |
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| Affiliation: | (Lanzhou Institute of Glaciology and Geocryology,the Chinese Academy of Sciences,730000) |
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| Abstract: | Radiation properties of snow in high mountains are greatly influenced by the distinct
change in altitude,slope and aspect.Atmosphere correct and terrain normalization must be
applied to high spatial resolution images such as TM to obtain normalized images.By de-
veloping a simple atmosphere correct and solar irradiance simulation model,and under the
supporting of high resolution digital elevation model and the measured weather condition
of the test area,the spectral reflectance factor of the image is calculated.The procedure is
tested in a case study in Tianshan mountain using TM scene of Sep.3,1989.The result
shows it is important to quantitative remote sensing of snow.Meanwhile,the limitations of
this method are also discussed in this paper. |
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| Keywords: | Terrain normalizationzz Atmosphere correctzz Remote sensing of snowzz |
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