Short Name:

MYD13A2

MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid V061

The MYD13A2 Version 6.1 product provides Vegetation Index (VI) values at a per pixel basis at 1 kilometer (km) spatial resolution. There are two primary vegetation layers. The first is the Normalized Difference Vegetation Index (NDVI), which is referred to as the continuity index to the existing National Oceanic and Atmospheric Administration-Advanced Very High Resolution Radiometer (NOAA-AVHRR) derived NDVI. The second vegetation layer is the Enhanced Vegetation Index (EVI), which has improved sensitivity over high biomass regions. The algorithm for this product chooses the best available pixel value from all the acquisitions from the 16 day period. The criteria used is low clouds, low view angle and the highest NDVI/EVI value. Provided along with the vegetation layers and the two quality assurance (QA) layers are reflectance bands 1 (red), 2 (near-infrared), 3 (blue), and 7 (mid-infrared), as well as four observation layers. Validation at stage 3 (https://modis-land.gsfc.nasa.gov/MODLAND_val.html) has been achieved for the MODIS Vegetation Index product suite. Further details regarding MODIS land product validation for the MOD13 data products are available from the MODIS Land Team Validation site (https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MOD13). Improvements/Changes from Previous Versions * The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017. * A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).

Overview Download Data Services Tools Citation Information Documentation Additional Information

Science Keywords:

Spatial Extent:

Bounding Rectangle:

N: 90.0 S: -90.0 E: 180.0 W: -180.0

Data Format(s):

Distribution: HDF-EOS

Temporal Extent:

2002-07-04 to now

Platform(s):

Aqua

Data Center(s):

LP DAAC

Instrument(s):

MODIS

Version:

061

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Title: MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid V061
Creator: Kamel Didan
Publisher: NASA EOSDIS Land Processes DAAC
Release Date: 2021-02-16T00:00:00.000Z
Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
Linkage: https://doi.org/10.5067/MODIS/MYD13A2.061

USER'S GUIDE: https://lpdaac.usgs.gov/documents/621/MOD13_User_Guide_V61.pdf, The technical information in the User's Guide enables users to interpret and use the data products.
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD): https://lpdaac.usgs.gov/documents/104/MOD13_ATBD.pdf, The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
GENERAL DOCUMENTATION: https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/61/MYD13A2, The File Specification provides a description of the product file including Scientific Data Sets and their attributes.

Purpose
Science Research
Version Description
Collection Version 6.1 Processing and Reprocessing
DOI
10.5067/MODIS/MYD13A2.061

https://doi.org
Search for granules from this collection

Data Dates

Creation	2010-10-13T07:39:42.906Z
Last Revision	2015-09-30T10:48:40.532Z

Processing Level

Sensor Measurements

Quality

Collection Progress
Active
Access Constraints

None

Related URLs

Additional Attributes

Name: HORIZONTALTILENUMBER INT Description: Horizontal tile number of a grid, which increases from left to right.
Name: QAPERCENTGOODQUALITY INT Description: Percent of pixels with good quality
Name: QAPERCENTNOTPRODUCEDCLOUD INT Description: Percent of pixels under cloud
Name: QAPERCENTNOTPRODUCEDOTHER INT Description: Percent of pixels not produced due to some reason other than cloud
Name: QAPERCENTOTHERQUALITY INT Description: Percent of pixels with not so good quality
Name: VERTICALTILENUMBER INT Description: Vertical tile number of a grid, which increases from top to bottom.
Name: PROCESSVERSION STRING Description: Version of the process software that generated the product.
Name: TileID INT Description: MODIS Land tile identification number which represents a geographical area on the surface of the Earth bounded by latitude and longitude coordinates.
Name: INPUTPRODUCTRESOLUTION STRING Description: Resolution of input products
Name: NDVI1KM16DAYQCLASSPERCENTAGE INT Description: Percentage of pixels with best quality in the 16-day 1km NDVI
Name: EVI1KM16DAYQCLASSPERCENTAGE INT Description: Percentage of pixels with best quality in the 16-day 1km EVI
Name: identifier_product_doi STRING Description: Digital object identifier that uniquely identifies this data product
Name: identifier_product_doi_authority STRING Description: URL of the digital object identifier resolving authority

Projects

Project Short Name	Campaigns	Project Dates
Aqua	Aqua	No dates provided.

Coverage Type	Zone Identifier	Geometry	Granule Representation
HORIZONTAL	MODIS Sinusoidal Tiling System	CARTESIAN	GEODETIC

Resolution and Coordinate System

Horizontal Data Resolution

Gridded Resolutions
- Gridded Resolution 1
  X Dimension
  1000.0 Meters
  Y Dimension
  1000.0 Meters

Tiling Identification Systems

System Name	Coordinate 1 Min	Coordinate 1 Max	Coordinate 2 Min	Coordinate 2 Max
MODIS Tile SIN	0.0	35.0	0.0	17.0

Location Keywords

- GEOGRAPHIC REGION
- GLOBAL

LP DAAC
ARCHIVER

Land Processes Distributed Active Archive Center
- U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
  Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time

605-594-6116

866-573-3222

Email
Contact Details
LP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/

Home Page
NASA/GSFC/SED/ESD/TISL/MODAPS
PROCESSOR

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
- NASA/GSFC Code 922
  GREENBELT, Maryland 20771
301-614-5515

Email
Contact Details
Contact for data content concerns
https://modaps.modaps.eosdis.nasa.gov/

Home Page

LP DAAC User Services
User Services

LP DAAC User Services
LP DAAC
- U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
  Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time

605-594-6116

866-573-3222

Email
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/

Home Page

Metadata Dates

Creation	2019-06-26T16:52:00.000Z
Last Revision	2021-02-16T20:06:00.000Z

File Distribution Information

Format: HDF-EOS

Format Type: Native

Media: HTTP

Average File Size: 9.0 MB

Total Collection File Size Begin Date: 2002-07-04T00:00:00.000Z

CMR Search

MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid V061

Collection Information

Data Identification

Data Dates

Related URLs

Other Descriptive Keywords

Additional Attributes

Acquisition Information

Projects

Temporal Information

Spatial Information

Resolution and Coordinate System

Horizontal Data Resolution

Gridded Resolutions

Gridded Resolution 1

Tiling Identification Systems

Location Keywords

Data Centers

LP DAAC

Land Processes Distributed Active Archive Center

NASA/GSFC/SED/ESD/TISL/MODAPS

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Contacts

LP DAAC User Services

LP DAAC User Services

Metadata Dates

Archive And Distribution Information

File Distribution Information