MODIS/Terra Leaf Area Index/FPAR 8-day L4 Global 1km SIN Grid


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EDG Data Set Name Granule Shortname

MODIS/Terra Leaf Area Index/FPAR 8-day L4 Global 1km SIN Grid MOD15A2

Version Acquisition Range Science Quality Status

V003 August 29, 2002 (2002241) - October 7, 2002 (2002280) Provisional as of Nov 1, 2000

V004 February 26, 2000 (2000057) Provisional as of February 26, 2000

Terra/MODIS

MODIS V004 LAI over North America for May 24, 2000. Data has been reprojected to Goodes.

Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimension = 2 (1200x1200 row/column)
Average File Size = 5.8 Mb
Resolution = 1 kilometer
Projection = Sinusoidal
Data Format = HDF-EOS
Bands = 4

Product Description
The MOD15 Leaf Area Index (LAI) and Fraction of Photosynthetically Active Radiation absorbed by vegetation (FPAR,) are 1 km global data products updated once each 8-day period throughout each calendar year. LAI defines an important structural property of a plant canopy as the one sided leaf area per unit ground area. FPAR measures the proportion of available radiation in the photosynthetically active wavelengths (400 to 700 nm) that a canopy absorbs. These products are derived from the atmosphere corrected surface reflectance product MOD09, land cover product MOD12 and ancillary information on surface characteristics using a 3D radiative transfer model. LAI and FPAR are biophysical variables which describe canopy structure and are related to functional process rates of energy and mass exchange. Both LAI and FPAR have been used extensively as satellite derived parameters for calculation of surface photosynthesis, evapotranspiration, and annual net primary production. These products are essential in calculating terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation.

NOTE:These products are validated, meaning that product uncertainties are well defined over a range of representative conditions. Although there may be later improved versions, these data are ready for use in scientific publications. Users are advised that there was a bug in the module responsible for reading-in view/illumination geometries (negative values were interpreted incorrectly). This bug affects local product values: at tile scale the effect is negligible. Bug is fixed as of February 28, 2003. The affected composites include 2000057-2000313 and 2003001-2003057. Development team will perform reprocessing of affected composites with minimum requirenment of reprocessing tiles over EOS core validation sites.

SDS UNITS DATA TYPE-bit FILL VALUE VALID RANGE Multiply by
SCALE FACTOR Calibrated_nt

Fpar_1km % 8-bit unsigned integer 255 0 - 100 0.01 21

Lai_1km m^2/m^2 8-bit unsigned integer 255 0 - 100 0.10 21

*FparLai_QC class flag 8-bit unsigned integer 255 0 - 254 na na

FparExtra_QC class flag 8-bit unsigned integer 255 0 - 254 na na

*MODIS LAI/FPAR QA Science Data Sets

Non-Terrestrial Value Index/Fill Value Index

Fpar_1km and Lai_1km

255 Fill Value

254 Landcover assigned as perennial salt or inland fresh water

253 Landcover assigned as barren, sparse vegetation (rock, tundra, desert)

252 Landcover assigned as perennial snow, ice

251 Landcover assigned as permanent wetlands/inundated marshland

250 Landcover assigned as urban/built-up

249 Landcover assigned as unclassified/not able to determine

View a Version Formatted for Printing

Retrieve the MOD15A2v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MOD15A2.4&group=MOLT
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD15A2.004/

Order These Data through the EOS Data Gateway
MODIS/TERRA LEAF AREA INDEX/FPAR 8-DAY L4 GLOBAL 1KM SIN GRID V004

EOS Data Gateway Search Tips

Data Center: LPDAAC

Sensor: MODIS

Dataset: MODIS/Terra Leaf Area Index/FPAR 8-day L4 Global 1km SIN Grid

Spatial: HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min

Geographic Extent: Type Lat/Long Range or Draw on Map

Temporal Extent: 2000-02-24 to present

Product Information

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

User Guide
(http://cybele.bu.edu/modismisr/products/modis/productuserg.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 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)
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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

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URL: http://LPDAAC.usgs.gov/modis/mod15a2v4.asp
Technical Contact: LPDAAC@eos.nasa.gov
Last Update: Tuesday, April 25, 2006
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