+ NASA Homepage

Global MODIS vegetation indices, produced at 16 day and 250, 500, 1000m and CMG spatial resolutions, provide consistent spatial and temporal comparisons of terrestrial vegetation canopy greenness, a composite property of leaf area, chlorophyll and canopy structure.
Two vegetation index products are derived from atmosphere corrected, bidirectional red, near-infrared, and blue surface reflectances that are masked for water, clouds and cloud shadow; the MODIS NDVI which provides continuity with NOAA's AVHRR time series record for historical and climate applications, and the enhanced vegetation index, EVI, which minimizes canopy- soil and aerosol variations and improves sensitivity over dense vegetation conditions. The two products more effectively characterize a global range of vegetation states and processes, and improve upon the extraction of canopy biophysical parameters.
Product PI: Alfredo Huete
PI-maintained product web page

See links below to the Product Description pages posted at the LP DAAC (product details, data access links, user guides and more....)