Independent pixel approximation
From Glossary of Meteorology
independent pixel approximation
In radiation modeling, the assumption that the radiative properties of a given horizontal region (or pixel in a satellite image) may be considered in isolation from neighboring pixels.
Its purpose is to allow the application of one-dimensional radiative transfer theory. The accuracy of this approximation depends on the size of the pixel and the degree of heterogeneity within the pixel and between neighboring pixels.
Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact firstname.lastname@example.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.