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

These data are a copy of MODIS data from the NASA Level-1 and Atmosphere Archive & Distribution System (LAADS) Distributed Active Archive Center (DAAC). The copy is potentially only a subset. Below is the description from https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MYD13A2

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 providing continuity for time series applications over this rich historical archive. MODIS also includes a new Enhanced Vegetation Index (EVI) product 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 MYD13A2 data are provided every 16 days at 1-kilometer spatial resolution as a gridded level-3 product in the Sinusoidal projection. 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.

Collection-5 MODIS/Aqua Vegetation Indices products are Validated at 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.

Shortname: MYD13A2 , Platform: Aqua , Instrument: MODIS , Processing Level: Level-3 , Spatial Resolution: 1 km , Temporal Resolution: 16 day , ArchiveSets: 6, 61 , Collection: MODIS Collection 6 (ArchiveSet 6) , PGE Number: PGE35 , File Naming Convention: MYD13A2.AYYYYDDD.hHHvVV.CCC.YYYYDDDHHMMSS.hdf YYYYDDD = Year and Day of Year of acquisition hHH = Horizontal tile number (0-35) vVV = Vertical tile number (0-17) CCC = Collection number YYYYDDDHHMMSS = Production Date and Time , Citation: Kamel Didan - University of Arizona, Alfredo Huete - University of Technology Sydney and MODAPS SIPS - NASA. (2015). MYD13A2 MODIS/Aqua Vegetation Indices 16-Day L3 Global 1km SIN Grid. NASA LP DAAC. http://doi.org/10.5067/MODIS/MYD13A2.006 , Keywords: Climate Change, Canopy Characteristics, Biomass, Vegetation Index, Plant Phenology, Length of Growing Season

Date (Publication): 2021-04-15T14:08:00

Date (Creation): 2021-04-15T14:08:00

Citation identifier: https://catalogue.ceda.ac.uk/uuid/f10420bececd447eb1b74db9d66ef12a

Citation identifier: National Aeronautics and Space Administration (NASA) / f10420bececd447eb1b74db9d66ef12a

Point of contact

Organisation name	Electronic mail address	Role
National Aeronautics and Space Administration (NASA)	unknown	Author
NERC EDS Centre for Environmental Data Analysis	support@ceda.ac.uk	Custodian
NERC EDS Centre for Environmental Data Analysis	support@ceda.ac.uk	Distributor
National Aeronautics and Space Administration (NASA)	unknown	Principal investigator
NERC EDS Centre for Environmental Data Analysis	support@ceda.ac.uk	pointofContact
National Aeronautics and Space Administration (NASA)	unknown	Publisher

Maintenance and update frequency: As needed

Update scope: Dataset

Keywords

Climate Change
Canopy Characteristics
Biomass
Vegetation Index
Plant Phenology
Length of Growing Season

GEMET - INSPIRE themes, version 1.0

orthoimagery

Access constraints: Other restrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: Other restrictions

Other constraints: Under the following licence https://modaps.modaps.eosdis.nasa.gov/services/faq/LAADS_Data-Use_Citation_Policies.pdf, appropriate use of these data may fall under unclassified use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Imagery base maps earth cover

Begin date: 2002-07-03T23:55:00

Unique resource identifier: WGS 84

Distribution format

Name	Version
HDF

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/f10420bececd447eb1b74db9d66ef12a	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/neodc/modis/data/MYD13A2	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	https://ladsweb.modaps.eosdis.nasa.gov/search/order/2/MYD13A2--6	LAADS DAAC - Search for Product Files

OnLine resource

Protocol	Linkage	Name
	https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/6/MYD13A2/	LAADS DAAC - Data Archive

OnLine resource

Protocol	Linkage	Name
	http://landval.gsfc.nasa.gov/ProductStatus.php?ProductID=MOD13	MODIS Vegetation Indices (MYD13) validation status

OnLine resource

Protocol	Linkage	Name
	http://vip.arizona.edu/MODIS_UsersGuide.php	MODIS Vegetation Index User's Guide (MOD13 Series)

OnLine resource

Protocol	Linkage	Name
	https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/6/MOD13A2	LAADS DAAC - Collection 6 File Specification

OnLine resource

Protocol	Linkage	Name
	http://dx.doi.org/10.5067/MODIS/MYD13A2.006	Dataset DOI

Hierarchy level: Dataset

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services