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apparent reflectance

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  1. [digital image processing] The ratio of upwelling irradiance to downwelling irradiance, resulting in a dimensionless unit.
  2. [Esri software] A function that calibrates imagery values using sun elevation, sensor gain/bias, and acquisition date to derive top of atmosphere (TOA) reflectance and sun angle correction. Also known as albedo or surface brightness in planetary science.

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