MODIS/Aqua Surface Reflectance 8-Day L3 Global 250m SIN Grid V061

MYD09Q1 Version 6.1 provides atmospherically corrected surface spectral reflectance estimates for Aqua MODIS Bands 1 and 2 at a 250-meter resolution, composited over an 8-day period. The pixel selection criteria for the composite include cloud conditions and solar zenith angle, defaulting to the pixel with the minimum blue channel value. This dataset includes two quality layers and incorporates calibration improvements such as polarization correction and updates to the response-versus-scan angle model.

Use Cases

• Monitoring vegetation indices based on atmospherically corrected red and near-infrared reflectance bands.
• Assessing land surface change over time using the 8-day composite surface reflectance product.
• Validating atmospheric correction models using the provided quality assurance layers.
• Studying surface albedo and radiative properties from the calibrated reflectance data.

Strengths

• Provides data at a consistent 250-meter spatial resolution.
• Includes known issue documentation and quality flags for non-functional detectors, allowing for informed data handling.
• Incorporates specific calibration improvements from Version 6.1, including polarization correction.

Limitations

• Key metadata such as row count, column names, and exact file size are unspecified across all sources.
• The dataset has known sensor issues, with a majority of Band 6 detectors being non-functional.
• Sources conflict on the presence of tags and some metadata fields, indicating potential inconsistencies in platform records.

Provenance

Source

LPCLOUD for NASA

Collection Method

Satellite remote sensing from the Aqua MODIS instrument.

Freshness

Last updated on 2026-04-10 according to two sources.

Geography

Global coverage on a sinusoidal grid.