This Version 004 MODIS product is decommissioned.
The MODIS level-2G 1km surface reflectance data state QA product MOD09GST, is a
restructured version of its primary input, the state QA data in MOD09_L2. This
product summarizes the quality of the MOD09 products, specifically atmospheric
and other correction states. The product contains quality assurance data
pertaining to cloud and cloud shadow, land and water designations, aerosols,
and the data source of corrections performed on the file. The data set also
contains the number of observations for each pixel.
Data Set Characteristics:
Area: ~10 degrees x 10 degrees lat/long
Image Dimensions: 1200 x 1200 rows/columns
File Size: 10-20 MB
Resolution: ~1000 meters
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 2
Version-4 MODIS/Terra data are validated products.
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 still experimental in nature upon their initial release.
Investigations are underway to assess the scientific validity of these
The Land Processes Distributed Active Archive
Center (LP DAAC) home page contains information
about the LP DAAC, its products, and its services.
The Web site also provides access to NASA's Earth
Observing System (EOS) Data Gateway, which is a
Web-based query system providing information
on this data set and on a variety of other data sets.
The EOS Data Gateway also supports data visualization
and ordering services.