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Version	Acquisition Range	Science Quality Status
V004	January 1, 2001 (2001001) - December 31, 2004 (2004365)	Validated Stage 1 as of January 1, 2001

Data Set Characteristics Image Dimensions  = 3 (2 x1200 x 1200 num_modes/row/column) Area = Nominal 10° x 10° lat/long Size = 1200 x 1200 rows/columns Average File Size = 41.3 MB Resolution = Nominal 1 kilometer Projection = Sinusoidal Data Type = 16-bit Unsigned Integer Data Format = HDF-EOS Science Data Sets (SDS) = 8

The image above is a global mosaic created from tiles of Onset_Greenness_Increase data from the MOD12Q2 product. The rainbow color scheme uses the red to blue spectrum to designate Day 001 to Day 365 of 2001 as the day of year vegetation began "greening up" worldwide.  Vegetation growth, maturity, and senescence are all included as phenological markers in the MOD12Q2 product, which helps track seasonal cycles in terms of environmental and climatic change.

Product Description
The MODIS Global Vegetation Phenology product (MOD12Q2) provides estimates of the timing of vegetation phenology at global scales.  As such, MOD12Q2 identifies the vegetation growth, maturity, and senescence marking seasonal cycles (see Science Data Sets listed on the table below).  The product is produced twice per year using 24 months of data as input (i.e., the 12 months of interest, bracketed by six months on either side).  The first production period highlights July through June (eg., July 2003-June 2004), and the second run focuses on January through December (eg., January 2004-December 2004).  This production schedule accounts for hemispheric differences in the timing of growing seasons, and enables the product to catch 2 growth cycles if necessary. 

The primary inputs to this product are vegetation index data, whose range and summation are included as supplementary information in the MOD12Q2.  The vegetation index data are derived by executing the MODIS Enhanced Vegetation Index algorithm (Huete, et al, 2002) on MODIS Nadir BRDF-Adjusted Reflectance values (MCD43B4) instead of the MODIS Surface Reflectance (MOD09A1) as is done to produce the MODIS VI product (MOD13A2).

The data are available in HDF-EOS file format at 1-km spatial resolution for the global extent of land area in 317 sinusoidally projected 10° tiles.

NOTE: These products are validated to Stage 1.  Product accuracy has been estimated using a small number of independent measurements obtained from selected locations and time periods and ground-truth/field program effort.  Although there may be later improved versions, these data are ready for use in scientific publications.

SDS	UNITS	DATA TYPE-bit	FILL VALUE	VALID RANGE	SCALE FACTOR
Onset_Greenness_Increase	days since 1 January 2000	16-bit unsigned integer	32767	0 - 32767	1.0
Onset_Greenness_Maximum	days since 1 January 2000	16-bit unsigned integer	32767	0 - 32767	1.0
Onset_Greenness_Decrease	days since 1 January 2000	16-bit unsigned integer	32767	0 - 32767	1.0
Onset_Greenness_Minimum	days since 1 January 2000	16-bit unsigned integer	32767	0 - 32767	1.0
NBAR_EVI_Onset_Greenness_Minimum	NBAR EVI value	16-bit unsigned integer	32767	0 - 32767	0.0001
NBAR_EVI_Onset_Greenness_Maximum	NBAR EVI value	16-bit unsigned integer	32767	0 - 32767	0.0001
NBAR_EVI_Area	NBAR EVI area	16-bit unsigned integer	32767	0 - 32767	0.01
*Dynamics_QC	concatenated flags	16-bit unsigned integer	65535	0,0	na

*MODIS Surface Reflectance QC Science Data Sets

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MODIS/TERRA LAND COVER DYNAMICS YEARLY L3 GLOBAL 1KM SIN GRID V004

Product Information

Product Description (http://modis-land.gsfc.nasa.gov/landcover.htm)

User Guide (http://www-modis.bu.edu/landcover/userguidelc/)

Algorithm Theoretical Basis Document (ATBD) (http://modis.gsfc.nasa.gov/data/atbd/atbd_mod12.pdf)

MODIS Standard Data Products Catalog (http://modis.gsfc.nasa.gov/data/dataprod/index.php)

EOS Data Products Handbook Volume 1 (2000) (http://modis.gsfc.nasa.gov/data/dataprod/index.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
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Fax:	605-594-6963
Email:	LPDAAC@eos.nasa.gov
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