Investigation of Solar Zenith Angle Dependence of NOAA GVI Data and its Correction
Investigation of Solar Zenith Angle Dependence of NOAA GVI Data and its Correction
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NOAA GVI 数据太阳天顶角依赖性的研究及其修正
DOI：
10.4287/jsprs.30.3_34
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
R. Tateishi
中科院分区：
文献类型：
--
作者：
M. Matsumoto;T. Odajima;K. Kajiwara;R. Tateishi
通过使用基于 10 个大气模型和 4 个表面模型的 LOWTRAN7 进行模拟，澄清了 NDVI 与 NOAA AVHRR 数据的太阳天顶角 (SZA) 依赖性。在模拟中，考虑了SZA对辐射传输的影响。很明显，在较大的 SZA 条件下，NDVI 减小，并且 NDVI 包含较多的路径辐射。可以得出结论，在大气条件均匀的有限条件下，SZA小于80°的NDVI可以通过NDVI的SZA依赖性的近似公式(cos(SZA)的五阶多项式)来校正。为了更精确的校正，有必要估计大气条件。
Solar zenith angle (SZA) dependence of NDVI from NOAA AVHRR data is clarified by the simulation using LOWTRAN7 based on 10 atmospheric models and 4 surface models. In the simulation, the effect of SZA to radiative transfer is taken into account. It becomes evident that NDVI decreases and NDVI contains much path radiance in larger SZA condition. It can be concluded that in a limited condition when the atmospheric condition is uniform, NDVI with SZA less than 80° is correctable by an approximated formulation of SZA dependence of NDVI (5th. order polynominal of cos (SZA) ) . For more precise correction, it is necessary to estimate atmospheric condition.