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Why is there so much color variation among the Landsat 7 browse images?

April 26, 2017browse color images Landsat variation

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Why is there so much color variation among the Landsat 7 browse images?

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A custom color stretch is performed on the raw Landsat 7 data, based on individual scene content for bands 5, 4, and 3. Scenes from within the same area and/or acquisition date may vary in band content (due to differences such as cloud content or ground moisture), and this differing content will cause variation in the results of the color stretch.