MODIS/Aqua Surface Reflectance Daily L3 Global 0.05Deg CMG V006

MYD09CMG V006 provides 25 layers of daily, atmospherically corrected surface spectral reflectance from Aqua MODIS bands 1-7, resampled to a 5600-meter Climate Modeling Grid. This product is designed for climate simulation models but was decommissioned on July 31, 2023, with users directed to Version 6.1. Known issues include an aerosol flagging error over bright surfaces, which was corrected in the subsequent version.

Use Cases

• Climate model initialization and validation based on the 5600-meter Climate Modeling Grid.
• Monitoring large-scale land surface changes using the 7 spectral reflectance bands.
• Assessing atmospheric correction performance by comparing with the Quality Assurance layers.
• Deriving downstream products like albedo and vegetation indices using the surface reflectance estimates.

Strengths

• Provides 25 data layers, including 7 spectral bands and brightness temperature data.
• Corrects for atmospheric conditions such as gases, aerosols, and Rayleigh scattering.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance and wide usage.

Limitations

• Dataset is deprecated (decommissioned July 31, 2023), directing users to a newer version.
• Contains a known issue where retrievals may be incorrectly flagged as 'High Aerosol' over bright surfaces.
• Metadata completeness is low, with column names, row counts, and specific temporal coverage unspecified.

Provenance

Source

LPCLOUD (NASA MODIS Land Processing Distributed Active Archive Center).

Collection Method

Satellite remote sensing data from the Aqua MODIS instrument, processed to surface reflectance.

Freshness

Last updated dates conflict between sources: 2026-04-10 and 2023-02-25.

Geography

Global coverage.