MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid
Entry ID: MYD13A2

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Summary
Abstract: 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 cirrus 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 MYD13A2 data are provided every 16 days at 1-kilometer spatial resolution as a gridded level-3 product in the Sinusoidal projection. VI production is phased between Terra and Aqua acquisitions, with Terra beginning on Day 001 and Aqua beginning on Day 008.

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.

V005 Data Set Characteristics:
Area: ~10 degrees x 10 degrees
Image Dimensions: 1200 x 1200 rows/columns
File Size: 9 MB
Resolution: 1 kilometer
Projection: Sinusoidal
Data Format: HDF-EOS
Science Data Sets (SDSs): 12

V004 Data Set Characteristics (decommissioned):
Area: ~10 degrees x 10 degrees lat/long
Image Dimensions: 1200 x 1200 rows/columns
File Size: 32 MB
Resolution: ~1000 meters
Projection: Sinusoidal
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 11

V003 Data Set Characteristics (decommissioned):
Area: ~10 degrees x 10 degrees lat/long
Image Dimensions: 1200 x 1200 rows/columns
File Size: ~30 MB
Resolution: ~1000 meters
Projection: Integerized Sinusoidal
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 11

Related URL
Link: GET DATA > REVERB
Description: Interface to search, discover, and access EOS data products, and invoke available data services.


Link: GET DATA > ON-LINE ARCHIVE
Description: LP DAAC Data Pool provides direct access to all currently available MODIS products and the ability to download them via HTTP.


Link: GET DATA
Description: The MODIS Reprojection Tool on the Web (MRTWeb) is available for selected MODIS land products. MRTWeb’s capabilities include reprojecting to alternate map projections, spatial and spectral subsetting, resampling, and alternate output format options.


Link: GET DATA
Description: USGS EarthExplorer (EE) provides users the ability to query, search and order archived ASTER and MODIS products available from the LP DAAC. Registered users of EE have access to additional features than guest users.


Link: GET DATA
Description: The USGS Global Visualization Viewer (GloVis) is an online search and order tool driven by browse images. Users may select any geographical area of interest (for any given product) and view all available browse images for that area before deciding to order those products.


Link: VIEW PROJECT HOME PAGE
Description: The Land Processes Distributed Active Archive Center (LP DAAC) is one of several discipline-specific data centers within the NASA Earth Observing System Data and Information System (EOSDIS). The LP DAAC Web page provides information about available data products, services, documentation, order interfaces, and tools.


Link: VIEW PROJECT HOME PAGE
Description: The MODIS Land home page is maintained through NASA's Goddard Space Flight Center and documents various aspects of the land component of the MODIS mission.


Link: VIEW RELATED INFORMATION
Description: Detailed product descriptions and additional information including links for data access, user guides, and customer support, etc.


Geographic Coverage
 N: 80.0 S: -80.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: Land Processes Distributed Active Archive Center (LP DAAC)
Dataset Title: MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN
Dataset Release Place: Sioux Falls, South Dakota, USA
Dataset Publisher: U.S. Geological Survey
Version: V003 - V005
Online Resource: http://lpdaac.usgs.gov


Temporal Coverage
Start Date: 2002-07-04


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Latitude Resolution: 1 km
Longitude Resolution: 1 km


Science Keywords
BIOSPHERE >VEGETATION >VEGETATION INDEX    [Definition]
LAND SURFACE >LAND TEMPERATURE >LAND SURFACE TEMPERATURE    [Definition]


ISO Topic Category
BIOTA
GEOSCIENTIFIC INFORMATION


Platform
TERRA >Earth Observing System, TERRA (AM-1)    [Information]


Instrument
MODIS >Moderate-Resolution Imaging Spectroradiometer    [Information]


Project
EOSDIS >Earth Observing System Data Information System    [Information]
ESIP >Earth Science Information Partners Program    [Information]


Quality
For more information on potential sensor-related anomalies, consult the following URL: http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/newPage.cgi?fileName=...


Access Constraints
None


Use Constraints
None


Keywords
IMAGERY
DAAC
LP DAAC
EOSDIS
USGS/EROS
ESIP
USGS
LPDAAC


Data Set Progress
IN WORK


Originating Center
USGS/EROS


Data Center
Land Processes Distributed Active Archive Center    [Information]
Data Center URL: https://lpdaac.usgs.gov/
Dataset ID: MYD13A2

Data Center Personnel
Name: LP DAAC USER SERVICES
Phone: (Toll Free) (866) 573-3222
Phone: (605) 594-6116
Fax: (605) 594-6963
Email: LPDAAC at usgs.gov
Contact Address:
LP DAAC User Services
U.S. Geological Survey (USGS)
Earth Resources Observation and Science (EROS) Center
47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Country: USA



Distribution
Distribution_Media: HTTP
Distribution_Size: 30 MB
Distribution_Format: HDF-EOS


Publications/References
Moderate Resolution Imaging Spectroradiometer (MODIS) publications written by the MODIS Science Team: [available online at http://modis.gsfc.nasa.gov/sci_team/pubs/]

National Aeronautics and Space Administration, 2000, MODIS data products catalog (EOS AM platform): [Greenbelt, Maryland], Goddard Space Flight Center, http://modis.gsfc.nasa.gov/data/dataprod/index.php.

National Aeronautics and Space Administration, 2000, EOS Reference Handbook, a Guide to NASA's Earth Science Enterprise and the Earth Observing System: Greenbelt, Maryland, Goddard Space Flight Center, 256 p. [available online in pdf format at http://eospso.gsfc.nasa.gov/ftp_docs/data_products_vol2.pdf].

Creation and Review Dates
DIF Creation Date: 2007-04-11
Last DIF Revision Date: 2013-01-31

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