MODIS/Terra+Aqua Land Aerosol Optical Depth Daily L2G Global 1km SIN Grid provides daily global measurements of aerosol optical depth over land. The dataset is produced by NASA's MODIS science team using the MAIAC algorithm on combined Terra and Aqua satellite data. It is a Level 2 gridded product supporting atmospheric correction for surface reflectance.
Use Cases
- Analyze daily aerosol optical depth patterns and trends over specific land regions using the gridded 1km data.
- Correlate aerosol levels with seasonal events like wildfires or dust storms using the daily temporal resolution.
- Validate and calibrate atmospheric models by comparing predicted aerosol loads with the MAIAC-derived optical depth measurements.
- Use the product as an input for calculating surface reflectance by applying the provided atmospheric properties and view geometry.
Strengths
- Global spatial coverage at a 1-kilometer pixel resolution.
- Daily temporal resolution from combined Terra and Aqua satellite observations.
- Produced using the MAIAC algorithm designed for atmospheric correction over land.
Limitations
- Data is limited to land surfaces, excluding oceans.
- Product accuracy can be reduced over bright surfaces like snow or deserts.
- Near Real Time (NRT) processing may involve preliminary algorithms subject to revision.
Provenance
- Source
- NASA MODIS science team, LANCEMODIS.
- Collection Method
- Satellite remote sensing data from MODIS instruments on Terra and Aqua satellites, processed with the MAIAC algorithm.
- Time Range
- Daily from the operational period of the combined Terra and Aqua MODIS instruments.
- Freshness
- Daily updates (Near Real Time).
- Geography
- Global land coverage.