Vegetation Indices

sample thumbnail of surface reflectance image

MODIS vegetation indices, produced on 16-day intervals and at multiple spatial resolutions, provide consistent spatial and temporal comparisons of vegetation canopy greenness, a composite property of leaf area, chlorophyll and canopy structure. Two vegetation indices are derived from atmospherically-corrected reflectance in the red, near-infrared, and blue wavebands; the normalized difference vegetation index (NDVI), which provides continuity with NOAA’s AVHRR NDVI time series record for historical and climate applications, and the enhanced vegetation index (EVI), which minimizes canopy-soil variations and improves sensitivity over dense vegetation conditions. The two products more effectively characterize the global range of vegetation states and processes.

The vegetation indices are retrieved from daily, atmosphere-corrected, bidirectional surface reflectance. The VI’s use a MODIS-specific compositing method based on product quality assurance metrics to remove low quality pixels. From the remaining good quality VI values, a constrained view angle approach then selects a pixel to represent the compositing period (from the two highest NDVI values it selects the pixel that is closest-to-nadir). Because the MODIS sensors aboard Terra and Aqua satellites are identical, the VI algorithm generates each 16-day composite eight days apart (phased products) to permit a higher temporal resolution product by combining both data records. The MODIS VI product suite is now used successfully in all ecosystem, climate, and natural resources management studies and operational research as demonstrated by the ever increasing body of peer publications.

 

Product PI: Kamel Didan
PI-maintained product web page

User Guide

ATBD

 

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


 

Product Name


Vegetation Indices 16-Day L3 Global 250m

Vegetation Indices 16-Day L3 Global 500m

Vegetation Indices 16-Day L3 Global 1km

Vegetation Indices 16-Day L3 Global 0.05Deg CMG

Vegetation Indices Monthly L3 Global 1km

Vegetation Indices Monthly L3 Global 0.05Deg CMG

Terra Product ID


MOD13Q1

MOD13A1

MOD13A2

MOD13C1

MOD13A3

MOD13C2

Aqua Product ID


MYD13Q1

MYD13A1

MYD13A2

MYD13C1

MYD13A3

MYD13C2

28-Oct-2014