MODIS/Aqua Vegetation Indices Monthly L3 Global 1km SIN Grid V005


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EDG Data Set Name	ShortName
MODIS/Aqua Vegetation Indices Monthly L3 Global 1km SIN Grid V005	MYD13A3

Version	Acquisition Range	Science Quality Status
004	August 2002 – December 2006
005	July 2002 –

V005 MYD13A3 Changes (abbreviated Points of Interest below)
V005 MYD13A3 Science Data Sets (specifications for data layers)
V005 MYD13A3 Quality Information
V005 MYD13 Production Overview

MODIS Level-3 Tile h11v05 eastern United States April 2007

Data Characteristics Area: ~10 degrees x 10 degrees lat/long Dimensions: 1200 x 1200 rows/columns File Size: ~ 9 MB Resolution: 1 kilometer Projection: Sinusoidal Data Format: HDF-EOS Science Data Sets (SDS HDF Layers): 11	The MYD13A3 images shown are samples of the MODIS/Aqua Vegetation Indices Monthly L3 Global 1km SIN Grid. The NDVI and EVI have been pseudo-colored to represent the biomass health of the eastern United States using tile h11v05 from April 2007. 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:

Replaced NDVI_QA and EVI_QA with one VI_QA Science Data Set and added a general QA overview band called “Pixel Reliability.”
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 469-nanometers, 645-nanometers, and 858-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 time series historical applications. MODIS also includes a new Enhanced Vegetation Index (EVI) that minimizes canopy background variations and maintains sensitivity over dense vegetation conditions. The EVI also uses the blue band to remove residual atmosphere contamination caused by smoke and sub-pixel thin cloud clouds. The MODIS NDVI and EVI products are computed from atmospherically corrected bi-directional surface reflectances that have been masked for water, clouds, heavy aerosols, and cloud shadows.

Global MYD13A3 data are provided monthly at 1-kilometer spatial resolution as a gridded level-3 product in the Sinusoidal projection. In generating this monthly product, the algorithm ingests all the 16-day 1-kilometer products that overlap the month and employs a weighted temporal average if data is cloud free, or a maximum value in case of clouds.

Vegetation indices are used for global monitoring of 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 and processes, including primary production and land cover conversion.

No specific information is currently available for Version-5 MODIS/Aqua Monthly Vegetation Indices products.

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Retrieve the MYD13A3.5 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MYD13A3.5&group=MOLA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLA/MYD13A3.005/

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Data Center: LPDAAC

Sensor: MODIS

Dataset: MODIS/Aqua Vegetation Indices Monthly L3 Global 1km SIN Grid V005

Spatial: HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min

Geographic Extent: Type Lat/Long Range or Draw on Map

Temporal Extent: 2002-07-01 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

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URL: http://LPDAAC.usgs.gov/modis/myd13a3v5.asp
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Last Update: Friday, March 14, 2008
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