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MODIS/Terra Surface Reflectance Daily L2G Global 1km and 500m SIN Grid V005

V005 MOD09GA Changes (abbreviated Points of Interest below)

V005 MOD09GA Science Data Sets (specifications for data layers)

V005 MOD09GA Quality Control Bit Legend

V005 Surface Reflectance Accuracy

The above image was created by reprojecting Bands 1, 4, 3 from the MOD09GA product from their native Sinusoidal to Universal Transverse Mercator (UTM) coordinates using the MODIS Reprojection Tool (MRT).� The data were acquired September 12, 2000 across the red rocks region of Southeastern Utah down through the heart of New Mexico (h09v06).
Data Set Characteristics: Area: ~10 degrees x 10 degrees lat/long File Size: ~85 MB Projection: Sinusoidal Data Format: HDF-EOS Data Group 1 kilometer: Dimensions: 1200 x 1200 rows/columns Resolution: 1000 meters Science Data Sets (SDS HDF Layers): 9 Data Group 500 meter: Dimensions: 2400 x 2400 rows/columns Resolution: 500 meters Science Data Sets (SDS HDF Layers): 12	This subset of the image above details Lake Powell and Lake Mead in the Glen Canyon National Recreation Area.�

V005 Change Points of Interest:

• Reduced number of data products:� MOD09GST, MOD09GHK, MODMGGAD, MODPT1KD, MODPTHKM encapsulated within MOD09GA
• Revised methodology for choosing first layer observation
• Reduced file volume:� internal compression

Product Description

The MODIS Surface Reflectance products provide an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption.� Low-level data are corrected for atmospheric gases and aerosols, yielding a level-2 basis for several higher-order gridded level-2 (L2G) and level-3 products.

MOD09GA provides Bands 1-7 in a daily gridded L2G product in the Sinusoidal projection, including 500-meter reflectance values and 1-kilometer observation and geolocation statistics.� 500-m Science Data Sets provided for this product include reflectance for Bands 1-7, a quality rating, observation coverage, observation number, and 250-m scan information. 1-kilometer Science Data Sets provided include number of observations, quality state, sensor angles, solar angles, geolocation flags, and orbit pointers.

Version-5 MODIS/Terra Surface Reflectance 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.

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Retrieve the MOD09GA.5 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MOD09GA.5&group=MOLT
Via FTP Directory: �ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD09GA.005/

Order Data through the EOS Data Gateway
(http://edcimswww.cr.usgs.gov/pub/imswelcome/)

EOS Data Gateway Search Tips

Data Center:	LPDAAC
Sensor:	MODIS
Dataset:	MODIS/Terra Surface Reflectance Daily L2G Global 1km and 500m SIN Grid V005
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://modis-land.gsfc.nasa.gov/surfrad.htm)

User Guide (http://modis-sr.ltdri.org/MAIN_SURFACE_PRODUCTAND%20USER%20GUIDE/MOD09_UserGuide.pdf)

Algorithm Theoretical Basis Document (ATBD) (http://modis.gsfc.nasa.gov/data/atbd/atbd_mod08.pdf)

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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