Home	About	Products	Data Tools	Order Data	News	Help/Edu	Links	Contact Us

V005 MYD09GA Changes  (abbreviated Points of Interest below)

V005 MYD09GA Science Data Sets (specifications for data layers)

V005 MYD09GA Quality Control Bit Legend     

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
The image above was created by combining MODIS Bands 1, 4, and 3 from a MYD09GA product. The data were acquired on March 3, 2007 over the southeastern U.S. in tile h10v05. The lower Mississippi River Valley is noticeable on the left and the Appalachian mountain range is obvious stretching from the lower left to the upper right. This image remains in its native Sinusoidal projection.

V005 Change Points of Interest:

•  Reduced number of data products:  MYD09GST, MYD09GHK, MYDMGGAD, MYDPT1KD, MYDPTHKM encapsulated within MYD09GA  
•  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.

MYD09GA 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/Aqua 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.

View Printer Friendly Version

Retrieve the MYD09GA.5 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MYD09GA.5&group=MOLA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLA/MYD09GA.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/Aqua 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:	2007-01-01 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

LP DAAC

EROS Home

About

Products

Data Tools

Order Data

News

Help/Edu

Links

Contact Us

---

This site is hosted by the USGS - NASA Distributed Active Archive Center U.S. Government: Public Information Exchange Resource NASA: Privacy Policy and Important Notices USGS: Privacy Statement, Disclaimer, Accessibility, FOIA DOI: Privacy Statement, Privacy Disclaimer, No FEAR Act, FOIA, Performance Plan, Children's Privacy URL: http://LPDAAC.usgs.gov/modis/myd09gav5.asp Technical Contact: LPDAAC@eos.nasa.gov Last Update: Tuesday, April 22, 2008 Download Adobe Acrobat Reader