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Daily 1-kilometer resolution global aerosol optical depth data from the combined Terra and Aqua MODIS satellites, processed using the MAIAC algorithm. This Level 2 product includes multiple science layers such as AOD at blue and green bands, uncertainty, water vapor, and smoke injection height. It is produced by NASA and has undergone calibration improvements in Version 6.1.
License is specified as 'other-license-specified' on Data.gov; users must review terms. Data is provided in HDF4 format with a complex structure involving orbit overpass dimensions. Known issues are documented on the MODIS/VIIRS Land Quality Assessment website.