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NASA's Health and Air Quality Applied Sciences Team (HAQAST) provides satellite-derived environmental data for public health applications. The collection includes annual artificial light at night levels at county and tract levels from 2012 to 2020, and annual and monthly tropospheric nitrogen dioxide (NO2) concentrations from 2018/2019 to the present, both across the Continental United States. These Level 3 products are derived from Suomi NPP VIIRS and Sentinel-5P TROPOMI instruments.
Data is hosted on AWS S3; specific file structures and access methods require inspection.