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Granule Shortname
MOD15A2

Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimension = 1200 x 1200 rows/columns
File Size = ~5.8 Mb
Resolution = 1000 meters
Projection = Integerized 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 MOD12and 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 still experimental in nature upon their initial release. Investigations are underway to assess the scientific validity of these products.

SDS	UNITS	DATA TYPE-bit	FILL VALUE	VALID RANGE	SCALE FACTOR
FPAR	na	8-bit unsigned integer	255	0-100	.01
LAI	na	8-bit unsigned integer	255	0-100	0.1
FPAR Quality	class flag	8-bit unsigned integer	255	0-254	na
LAI Quality	class flag	8-bit unsigned integer	255	0-254	na

View a Version Formatted for Printing

Order These Data through the EOS Data Gateway
MODIS/TERRA LEAF AREA INDEX/FPAR 8-DAY L4 GLOBAL 1KM ISIN GRID V003

EOS Data Gateway Search Tips

Data Center:	LPDAAC
Sensor:	MODIS
Dataset:	MODIS/Terra Leaf Area Index/FPAR 8-day L4 Global 1km ISIN Grid
Geographic Extent:	Type Lat/Long Range or Draw on Map
Temporal Extent:	August 29, 2002 (2002241) - October 7, 2002 (2002280)

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) 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
Web:	http://LPDAAC.usgs.gov

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