MOD09GA: Terra MODIS Daily Surface Reflectance at 500m and 1km

MOD09GA Version 6.1 provides atmospherically corrected surface spectral reflectance for Terra MODIS Bands 1-7, serving as foundational input for numerous downstream land products. The dataset includes 500-meter reflectance, observation, and quality bands, supplemented by ten 1-kilometer observation bands and geolocation flags. Calibration improvements in this version address optical crosstalk, response-versus-scan angle, and polarization effects for data from 2012-2017.

Use Cases

• Generating land cover and vegetation index products based on corrected spectral reflectance bands.
• Monitoring surface changes over time using daily global observations at 500m resolution.
• Assessing atmospheric aerosol and gas corrections applied to the raw satellite signal.
• Validating other satellite-derived surface property estimates using the provided quality assurance layers.

Strengths

• Provides data at two spatial resolutions: 500-meter and 1-kilometer bands.
• Includes specific calibration corrections for a defined period (2012-2017).
• Released under a permissive CC-BY-4.0 license on at least one major platform.

Limitations

• Column names and detailed schema are not provided by any source platform.
• Conflicting license information exists between platforms ('CC-BY-4.0' and 'other-license-specified').
• Known issues are documented but require external website consultation for full details.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Satellite observation from the Terra MODIS instrument, processed to Level-2G.

Time Range

Coverage includes data from at least 2012-2017, with likely ongoing collection.

Freshness

2026-04-10 00:43:06.031463

Geography

Global