 |
||||||||
| Home | About | Products | Data Tools | Order Data | News | Help/Edu | Links | Contact Us |
| EDG Data Set Name | Granule Shortname |
|---|---|
| MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid | MOD09A1 |
| 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) | Validated Stage 1 as of January 1 2003 |
Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 2 (2400x2400 row/column)
Average File Size = 161 MB
Resolution = 500 meters
Projection = Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 13
Product Description
The MODerate-resolution Imaging Spectroradiometer (MODIS) Surface Reflectance products are computed from bands 1-7 to provide an estimate of the surface spectral reflectance for each band as it would be measured at ground level in the absence of atmospheric scattering or absorption. A correction scheme identifies atmospheric gases, aerosols, and thin cirrus clouds.The MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid product, MOD09A1, is a composite of the previous 8 daily L2G Surface Reflectance products (MOD09GHK). The best observations during an 8-day period, as determined by overall pixel quality and observational coverage, are matched geographically according to corresponding 500m Pointer Files (MODPTHKM). Quality information for the MOD09A1 product is provided at three different levels of detail: for individual pixels, for each band and each resolution, and for the whole file.
The MOD09A1 image shown combines bands 1 (red), 4 (green) and 3 (blue) to display the eastern United States. A land/sea mask has been used to remove deep ocean water, which appears black in the image. Surface Reflectance data are generally used for land characterization research, and may be used to generate land-related products, or as input to global and regional climate models and surface energy balance models.
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.
| SDS | Units | Data Type-bit | Fill Value | Valid Range | Multiply by Scale Factor |
|---|---|---|---|---|---|
| Surface Reflectance for band 1 (620-670 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 2 (841-876 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 3 (459-479 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 4 (545-565 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 5 (1230-1250 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 6 (1628-1652 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| Surface Reflectance for band 7 (2105-2155 nm) | reflectance | 16-bit signed integer | -28672 | -100 - 16000 | 0.0001 |
| * Surface reflectance 500m quality control flags | Bit field | 32-bit unsigned integer | 4294967295 | 0-4294966531 | na |
| Solar zenith | Degree | 16-bit signed integer | 0 | 0 - 18000 | 0.01 |
| View zenith | Degree | 16-bit signed integer | 0 | 0 - 18000 | 0.01 |
| Relative azimuth | Degree | 16-bit signed integer | 0 | -18000 - 18000 | 0.01 |
| **Surface reflectance 500m state flags | Bit field | 16-bit unsigned integer | 65535 | 0 | na |
| Surface reflectance day of year | Julian Day | 16-bit unsigned integer | 65535 | 0 – 366 | na |
*MODIS Surface Reflectance QA Science Data Sets
View a Version Formatted for Printing
Retrieve the MOD09A1v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MOD09A1.4&group=MOLT
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD09A1.004/
Order These Data through the EOS Data Gateway
MODIS/TERRA SURFACE REFLECTANCE 8-DAY L3 GLOBAL 500M SIN GRID V004
| Data Center: | LPDAAC |
|---|---|
| Sensor: | MODIS |
| Dataset: | MODIS/Terra Surface Reflectance 8-Day L3 Global 500m 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
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/mod09a1v4.asp Technical Contact: LPDAAC@eos.nasa.gov Last Update: Tuesday, August 30, 2005 Download Adobe Acrobat Reader |
 |
