VJ143D47: VIIRS Valid Observation Quality for Band M7

Global daily data at 1000-meter resolution provides a quality layer for valid observations in the VIIRS M7 band, derived from a 16-day rolling window. This product is part of a suite designed for climate simulation models, focusing on the Bidirectional Reflectance Distribution Function (BRDF) and albedo parameters. The dataset incorporates algorithm improvements for calibration, geolocation, and aerosol flagging from the NOAA-20 VIIRS V002 processing stream.

Use Cases

• Assessing observation quality for BRDF/albedo retrievals based on the 16-day valid observation layer.
• Inputting pre-processed, quality-filtered reflectance data into global climate simulation models (CMG).
• Monitoring land surface changes by analyzing the temporal weighting of observations centered on a specific day.
• Validating downstream products like vegetation indices (VJ113) that depend on corrected aerosol and surface reflectance inputs.

Strengths

• Provides global coverage at a consistent 30 arc-second (1 km) Climate Modeling Grid (CMG) resolution.
• Incorporates algorithm improvements for calibration and geolocation across the entire NOAA-20 mission.
• Data is produced daily using a 16-day temporal composite, weighting observations to reduce gaps.

Limitations

• Metadata completeness is low: column names, row counts, and specific file sizes are not provided by any source.
• The dataset is a single-layer extract from a larger product suite (VJ143MA2), which may limit direct analysis without companion files.
• Known issues exist and require external consultation on the MODIS/VIIRS Land Quality Assessment website.

Provenance

Source

NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) satellite.

Collection Method

Satellite remote sensing, processed using the VJ143 algorithm suite.

Time Range

Covers the NOAA-20 mission period; data is produced daily.

Freshness

Last updated 2026-04-09 according to nasa_earthdata and datagov.

Geography

Global.