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Federal
ESAT: Environmental Source Apportionment Toolkit Python package
U.S. Environmental Protection Agency —
The Environmental Source Apportionment Toolkit (ESAT) is an open-source software package that provides API and CLI functionality to create source apportionment... -
Federal
Air Sensor Network Analysis Tool: R-Shiny Application Code
U.S. Environmental Protection Agency —
This includes the ASNAT R code as of December 2025. Later versions may be updated in the public EPA github or zenodo.