MCD19A1CMGL: Daily Global Land Surface Reflectance at 0.05 Degrees

25 Science Dataset layers provide daily surface reflectance estimates for MODIS bands 1-7, corrected for atmospheric gases and aerosols using the MAIAC algorithm. The product is generated daily by NASA on a global 0.05-degree Climate Modeling Grid. The dataset includes Bidirectional Reflectance Factor (BRF), normalized BRF, Nadir BRDF-Adjusted Reflectance (NBAR), and quality assessment data.

Use Cases

• Monitoring land surface changes based on daily, atmospherically corrected reflectance data.
• Modeling surface energy balance and albedo based on Bidirectional Reflectance Factor (BRF) and Nadir BRDF-Adjusted Reflectance (NBAR).
• Analyzing aerosol and atmospheric gas impacts on surface observations based on the MAIAC correction algorithm.
• Developing climate models based on reflectance data provided on a 0.05-degree Climate Modeling Grid (CMG).

Strengths

• Data is corrected for atmospheric interference using the advanced MAIAC algorithm, which combines pixel- and image-based processing.
• Provides 25 distinct Science Dataset layers, including reflectance for 7 spectral bands, quality flags, and geometric angles.
• Offers daily global coverage at a consistent 0.05-degree (approximately 5.6 km) spatial resolution.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Known data issues are documented separately in a user guide and external website, requiring additional review.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced from combined MODIS Terra and Aqua satellite data using the Multi-Angle Implementation of Atmospheric Correction (MAIAC) algorithm.

Time Range

Daily production.

Freshness

Last updated 2026-03-12 23:21:34.252623; freshness should be verified.

Geography

Global