Home	About	Products	Data Tools	Order Data	News	Help/Edu	Links	Contact Us

EDG Data Set Name	Granule Shortname
MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid	MYD13A2

Version	Acquisition Range	Science Quality Status
V003	March 6 2003 (2003065) - February 1 2004 (2004032)	Provisional
V004	June 26, 2002 (2002177)	Validated Stage 1 as of June 26, 2002

MODIS Level 3 Tile h08v05, July 12 2002

Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 2 (1200x1200 row/column)
Average File Size = 32 MB
Resolution = 1 km
Projection = Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 11

Product Description
The MODerate-resolution Imaging Spectroradiometer (MODIS) Vegetation Indices products use, as input, MODIS Aqua surface reflectances (MYD09) corrected for molecular scattering, ozone absorption, and aerosols. Two vegetation index (VI) algorithms are produced globally for land. One is the standard normalized difference vegetation index (NDVI), which is referred to as the "continuity index" to the existing NOAA-AVHRR derived NDVI. The other is an 'enhanced' vegetation index (EVI) with improved sensitivity into high biomass regions and improved vegetation monitoring through a de-coupling of the canopy background signal and a reduction in atmosphere influences. The two VIs compliment each other in global vegetation studies and improve upon the extraction of canopy biophysical parameters. A new compositing scheme that reduces angular, sun-target-sensor variations with an option to use BRDF models is utilized. The gridded vegetation indices include quality assurance (QA) flags with statistical data that indicate the quality of the VI product and input data.

NOTE: These products are still experimental in nature upon their initial release. Investigations are underway to assess the scientific validity of these products.

Each VI product contains 11 parameters, listed below:

*MODIS Vegetation Indices QA Science Data Sets

View a Version Formatted for Printing

Retrieve the MYD13A2v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MYD13A2.4&group=MOLA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLA/MYD13A2.004/

Order These Data through the EOS Data Gateway
MODIS/AQUA VEGETATION INDICES 16-DAY L3 GLOBAL 1KM SIN GRID V004

EOS Data Gateway Search Tips

Source:	Aqua
Sensor:	MODIS
Dataset:	MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid
Spatial:	HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min
Geographic Extent:	Type Lat/Long Range or Draw on Map
Temporal Extent:	2003-03-06 to 2004-02-01 (V003); 2002-07-04 to present (V004)

Product Information

Product Description (http://landval.gsfc.nasa.gov/MODLAND/vi.htm)

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

More Info on MODIS VI http://tbrs.arizona.edu/cdrom/Index.html

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

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

EOS Data Products Handbook Volume 2 (2000) (http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/data_products/vol2.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

This site is hosted by the USGS - NASA Distributed Active Archive Center U.S. Government: Public Information Exchange Resource NASA: Privacy Policy and Important Notices USGS: Privacy Statement, Disclaimer, Accessibility, FOIA DOI: Privacy Statement, Privacy Disclaimer, No FEAR Act, FOIA, Performance Plan, Children's Privacy URL: http://LPDAAC.usgs.gov/modis/myd13a2v4.asp Technical Contact: LPDAAC@eos.nasa.gov Last Update: Tuesday, August 30, 2005 Download Adobe Acrobat Reader