While there are various atmospheric radiative transfer models out there (see here), Planet uses the 6S radiative transfer model due to several reasons:
- It integrates with the Planet platform easily.
- It is one of the more widely used radiative transfer codes.
- It corrects atmospheric interference on Landsat-8 imagery, a model specifically designed for satellite applications.
- Due to its popularity, many scientific papers confirm the accuracy and suitability of this method for producing surface reflectance products of planets, considering its extensive use.
- It is easily accessible and free from any licensing problems.
- A source code is available and easily compiled, opening the possibility of customizations if needed.
- Generating configuration files for 6S and reading output files can be made easier with the existence of Py6S, a Python library.
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