Combined MODIS gap-filled Normalized Difference Vegetation Index data from the MCD19A3CMG product across the globe, May 3, 2010.View full-size image
The MCD19A3CMG Version 6.1 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-Angle Implementation of Atmospheric Correction (MAIAC) Vegetation Index Level 3 product produced daily in a 0.05 degree (5,600 meters at the equator) Climate Modeling Grid (CMG). The MCD19A3CMG product provides Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) at ground level in the absence of atmospheric scattering or absorption.
The MCD19A3CMG Vegetation Index data product contains the following Science Dataset (SDS) layers: NDVI, NDVI normalized to a fixed geometry of solar zenith angle at 45° and nadir view, gap-filled NDVI, EVI, and EVI normalized to a fixed geometry of solar zenith angle at 45° and nadir view. A low-resolution browse image is also included showing NDVI created using a composite of all available orbits.
No previous versions.
|File Size||~30 MB|
|Temporal Extent||2000-02-24 to Present|
|Coordinate System||Geographic Latitude and Longitude|
|Number of Science Dataset (SDS) Layers||5|
|Columns/Rows||7200 x 3600|
|Pixel Size||5600 m|
|SDS Name||Description||Units||Data Type||Fill Value||No Data Value||Valid Range||Scale Factor|
|NDVI||Daily Normalized DifferenceVegetation Index at surface||N/A||16-bit signed integer||-28672||N/A||0 to 10000||0.0001|
|NDVI_n||Daily NDVI normalized to SZA=45° and nadir view||N/A||16-bit signed integer||-28672||N/A||0 to 10000||0.0001|
|EVI||Daily Enhanced VegetationIndex at surface||N/A||16-bit signed integer||-28672||N/A||0 to 10000||0.0001|
|EVI_n||Daily EVI normalized to SZA=45° and nadir view||N/A||16-bit signed integer||-28672||N/A||0 to 10000||0.0001|
|NDVI_gapfill||Gap-filled NDVI||N/A||16-bit signed integer||-28672||N/A||0 to 10000||0.0001|
Product quality information is not available for MCD19A3CMG.
Known issues are described in Section 6 of the User Guide.
An artifact was discovered in the EVI, NDVI, and NDVI_gapfill layers over the entire swath of southern polar region. The affected region shows false retrieval of data during the summer months. The artifacts occurred over permanently snow-covered areas where no meaningful NDVI retrieval is expected. A software fix was implemented for forward processing in June 2023. Existing data products will not be reprocessed. Affected dates are listed on the Land Data Operational Products Evaluation Quality Assessment note.