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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Comparison of spectral characteristics between EO-1 ALI and IRS-P6 LISS-III imagery
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Comparison of spectral characteristics between EO-1 ALI and IRS-P6 LISS-III imagery

机译：EO-1 ALI和IRS-P6 LISS-III影像的光谱特征比较

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摘要

Data from the Indian Remote Sensing Satellite (IRS) P6 have been widely used for integrated land and water resources management. To complement and substitute data measured from other similar satellites and obtain constant measurements of the Earth's surface features, we evaluated the spectral characteristics between IRS-P6 LISS-III, a sensor of IRS P6, and EO-1 ALI by comparing their top-of-atmosphere (TOA) reflectance and normalized difference vegetation index (NDVI) of three nearly simultaneous image pairs. In particular, due to the difference in NIR band design between LISS-III and ALI, the spectral characteristics of NIR band of LISS-III were compared with the two NIR bands of ALI. The results demonstrate that a distinct linear correlation exists between the spectral characteristics of LISS-III and ALI, with R2 values ranging from 0.976 to 0.995 for TOA reflectance and from 0.992 to 0.997 for NDVI. Therefore, a mutual complementation and substitution of the TOA reflectance and NDVI between LISS4II and ALI images is feasible. Moreover, both TOA reflectance and NDVI of LISS-III are more similar to those of ALI at band 4 than to those of ALI at band 4P due to the difference in the two NIR bands of ALI.
机译：来自印度遥感卫星（IRS）P6的数据已被广泛用于土地和水资源综合管理。为了补充和替代从其他类似卫星测得的数据并获得对地球表面特征的恒定测量，我们通过比较IRS-P6 LISS-III（IRS P6的传感器）和EO-1 ALI的光谱特征，评估了它们的光谱特征。三个几乎同时成像的图像对的大气-大气（TOA）反射率和归一化植被指数（NDVI）。尤其是，由于LISS-III和ALI在NIR波段设计上的差异，将LISS-III的NIR波段的光谱特性与ALI的两个NIR波段进行了比较。结果表明，LISS-III和ALI的光谱特征之间存在明显的线性相关，TOA反射的R2值​​范围为0.976至0.995，NDVI的R2值范围为0.992至0.997。因此，在LISS4II和ALI图像之间TOA反射率和NDVI的相互补充和替代是可行的。此外，由于ALI的两个NIR波段不同，LISS-III的TOA反射率和NDVI与第4波段的ALI相比，与第4P波段的ALI更相似。

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