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Temporal influences on Landsat‐5 Thematic Mapper image in visible band

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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.
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Document Type: Research Article

Affiliations: 1: Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680‐0001, Japan 2: Hydrospheric Atmospheric Research Center, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, Japan 3: Graduate School of Environmental Studies, Nagoya University, Furo‐cho, Chikusa‐ku, Nagoya 464‐8601, Japan

Publication date: August 10, 2006

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