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V005 MOD13Q1 Changes (abbreviated Points of Interest below)

V005 MOD13Q1 Science Data Sets (specifications for data layers)

V005 MOD13Q1 Quality Information

V005 MOD13 Production Overview

MODIS Level-3 Tile June 25, 2000
Data Characteristics: Area: ~10 degrees x 10 degrees lat/long Dimensions: 4800 x 4800 rows/columns File Size: ~ 5 - 270 MB Resolution: 250 meters Projection: Sinusoidal Data Format: HDF-EOS Science Data Sets (SDS HDF Layers): 12 The MOD13Q1 images shown are samples of the MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid. The NDVI and EVI have been pseudo-colored to represent the biomass health of the western United States using tile h08v05 from June 25 – July 10, 2000. 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.

• Phased production between Terra and Aqua products for improved temporal frequency (Terra 16-day period starting Day 001, Aqua 16-day period starting Day 009)
• 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 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 MOD13Q1 data are provided every 16 days at 250-meter spatial resolution as a gridded level-3 product in the Sinusoidal projection.  Lacking a 250-m blue band, the EVI algorithm uses the 500-m blue band to correct for residual atmospheric effects, with negligible spatial artifacts.

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.

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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Retrieve the MOD13Q1.5 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MOD13Q1.5&group=MOLT
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD13Q1.005/

Order Data through the EOS Data Gateway
(http://edcimswww.cr.usgs.gov/pub/imswelcome/)

EOS Data Gateway Search Tips

Data Center:	LPDAAC
Sensor:	MODIS
Dataset:	MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid V005
Spatial:	HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min
Geographic Extent:	Type Lat/Long Range or Draw on Map
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
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