The Top of the Atmosphere Reflectance workflow is the most basic of the Atmospheric Correction workflows, and its settings are used in all other workflows. For instance, the settings in this workflow help you estimate the low- and high-reflectance thresholds required to perform cloud masking. They also help you identify the qualiy of the radiometric calibration coefficients available from the image, before further processing. The workflow converts pixel values to physical reflectance, as measured above the atmosphere. It normalizes images based on radiance values and image acquisition times, using only the required image information.
The TOA Reflectance workflow consists of the following processes:
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