MOD09CMA provides daily Level 3 global aerosol optical thickness data at a 0.05-degree spatial resolution. The product is derived from MODIS Terra sensor composites, specifically MOD09IDN, MOD09IDT, and MOD09IDS, selecting pixels based on minimum band 3 values after filtering for clouds and high solar zenith angles. It is produced by the LANCEMODIS organization.
Use Cases
- Analyze daily global aerosol optical thickness patterns from the MOD09CMA composite.
- Study aerosol transport and seasonal variation using the 0.05-degree gridded data.
- Validate atmospheric models with satellite-derived aerosol measurements from MODIS Terra.
- Investigate correlations between aerosol levels and cloud-filtered pixel selections based on band 3 (459-479 nm) values.
Strengths
- Global spatial coverage at a consistent 0.05-degree resolution.
- Daily temporal frequency provides high-resolution time-series data.
- Derived from multiple MODIS source products (MOD09IDN, MOD09IDT, MOD09IDS) for composite reliability.
Limitations
- Specific row count, file size, and temporal range are unknown.
- Data quality depends on cloud and solar zenith angle filtering algorithms, which may introduce biases.
- The linear latitude/longitude (Plate Carre) projection may not be optimal for all regional analyses.
Provenance
- Source
- LANCEMODIS via NASA Earthdata (MODIS/Terra)
- Collection Method
- Derived from MOD09IDN, MOD09IDT, and MOD09IDS orbit composites based on minimum band 3 values after excluding flagged pixels.
- Time Range
- null
- Freshness
- null
- Geography
- Global