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V005 MOD13 Changes (abbreviated Points of Interest below)

V005 MOD13C2 Science Data Sets (specifications for data layers)

V005 MOD13C2 Quality Information

V005 MOD13 Production Overview

MODIS Level 3 NDVI January 2001
Data Characteristics Area: Global Dimensions: 3600 x 7200 rows/columns File Size: ~19 MB Resolution: 0.05 degree (5600-meter) Projection: Lat/Lon Data Format: HDF-EOS Science Data Sets (SDS HDF Layers): 13	The image above is a global monthly composite of the MODIS Normalized Difference Vegetation Index (NDVI) included in the MOD13C2 product. The NDVI values have been pseudo-colored to represent biomass health across the globe using data acquired in January 2001. Due to their simplicity, ease of application, and widespread familiarity, vegetation indices have a wide range of usage within the user community. Some of the more common applications may include global biogeochemical and hydrologic modeling, agricultural monitoring and forecasting, land-use planning, land cover characterization, and land cover change detection.

V005 Change Points of Interest:

• This monthly VI product is generated per calendar month
• Replaced NDVI_QA and EVI_QA with one VI_QA Science Data Set
• Reduced file volume by using internal compression

Product Description
Global MODIS vegetation indices are designed to provide consistent spatial and temporal comparisons of vegetation conditions. Blue, red, and near-infrared reflectances, centered at 470-nanometers, 648-nanometers, and 848-nanometers, respectively, are used to determine the MODIS daily vegetation indices.

The MODIS Normalized Difference Vegetation Index (NDVI) complements NOAA's Advanced Very High Resolution Radiometer (AVHRR) NDVI products and provides continuity for historical applications. The MODIS NDVI product contains atmospherically corrected bi-directional surface reflectances masked for water, clouds, and cloud shadows. Another MODIS index, the Enhanced Vegetation Index or EVI, uses the blue band to remove residual atmospheric contamination caused by smoke and sub-pixel thin clouds. The EVI also uses feedback adjustment to minimize canopy background variations and to enhance vegetation sensitivity from sparse to dense vegetation conditions.

Global MOD13C2 data are cloud-free spatial composites of the gridded 16-day 1-kilometer MOD13A2, and are provided monthly as a level-3 product projected on a 0.05 degree (5600-meter) geographic Climate Modeling Grid (CMG). Cloud-free global coverage is achieved by replacing clouds with the historical MODIS time series climatology record.

Vegetation indices are used for globally monitoring vegetation conditions and are used in products displaying land cover and land cover changes. These data may be used as input for modeling global biogeochemical and hydrologic processes and global and regional climate. These data also may be used for characterizing land surface biophysical properties, including land cover.

Version-5 MODIS/Terra Vegetation Indices products are Validated Stage 2, meaning that accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Although there may be later improved versions, these data are ready for use in scientific publications.

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Data Center:	LPDAAC
Sensor:	MODIS
Dataset:	MODIS/Terra Vegetation Indices Monthly L3 Global 0.05Deg CMG V005
Geographic Extent:	Global
Temporal Extent:	2000-02-18 to present

Product Information

Product Description (http://modis-land.gsfc.nasa.gov/vi.htm)

User Guide (http://tbrs.arizona.edu/project/MODIS/index.php)

Algorithm Theoretical Basis Document (ATBD) (http://modis.gsfc.nasa.gov/data/atbd/atbd_mod13.pdf)

MODIS Standard Data Products Catalog (http://modis.gsfc.nasa.gov/data/dataprod/index.php)

EOS Data Products Handbook Volume 1 (2000) (http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/data_products/vol1.php)

Contact Information

LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) 47914 252nd Street Sioux Falls, SD 57198-0001
Phone:	605-594-6116
Toll Free:	866-573-3222
	866-LPE-DAAC
Fax:	605-594-6963
Email:	LPDAAC@eos.nasa.gov
Web:	http://LPDAAC.usgs.gov

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