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首页> 外文期刊>International journal of remote sensing >Temporal influences on Landsat-5 Thematic Mapper image in visible band
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Temporal influences on Landsat-5 Thematic Mapper image in visible band

机译：可见波段对Landsat-5专题测绘仪图像的时间影响

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摘要

The Landsat Thematic Mapper (TM) has provided fine spatial resolution data spanning two decades. These data are useful for long-term studies of environmental change. However, temporal factors such as sensor degradation, variation in Sun-target-satellite geometry, and variable atmospheric conditions can create inconsistencies in multi-temporal images and complicate data analysis. This study investigated temporal influences on satellite data. The methodology was developed based on a theoretically derived relationship between pixel values of pseudo-invariant features (PIFs) across time. The relationship was validated using multi-temporal Landsat-5 TM images, which showed that temporal factors contribute to PIF pixel values in both multiplicative and additive ways. For Landsat-5 TM level-0 data, temporal influences were simulated in terms of multiplicative and additive components. The results showed that atmospheric variation is the most influential factor, followed by variation in the Sun-target-satellite geometry and TM sensor degradation.
机译：Landsat专题制图仪（TM）提供了跨越二十年的精细空间分辨率数据。这些数据对于环境变化的长期研究很有用。但是，诸如传感器降级，太阳目标卫星几何形状的变化以及可变的大气条件等时间因素会在多时相图像中造成不一致，并使数据分析变得复杂。这项研究调查了时间上对卫星数据的影响。该方法是根据跨时间的伪不变特征（PIF）像素值之间的理论推导关系开发的。使用多时间Landsat-5 TM图像验证了这种关系，结果表明，时间因素以乘法和加法方式对PIF像素值都有贡献。对于Landsat-5 TM level 0数据，根据乘法和加法分量模拟了时间影响。结果表明，大气变化是影响最大的因素，其次是太阳目标卫星的几何形状变化和TM传感器退化。

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