MODIS/Terra Land Surface Temperature/Emissivity 5-Min L2 Swath 1km V041Entry ID: MOD11_L241
Abstract: The MODIS/Terra Land Surface Temperature and Emissivity (LST/E) products provide per-pixel temperature and emissivity values in a sequence of swath-based to grid-based global products. The MODIS/Terra LST/E 5-Minute L2 Swath 1 km data set (Short name: MOD11_L2), is produced daily at 5-minute increments, and covers both daytime and nighttime acquisitions including the polar regions.
The MODIS/Terra version-041 (V41) products use a modified version-4 (V4) LST algorithm and version-5 (V5) data inputs. The V41 products primarily address underestimation problems in the V5 Climate Modeling Grid (CMG) products. Recent validation activities reveal that the V5 CMG products underestimate LSTs up to 6K especially in desert and semi-arid regions. The production date for this collection starts with MODIS/Terra data acquisition from 2007-001. This beginning date is driven by the availability of the MODIS V5 data inputs (level-1B radiance data, geolocation data, cloud mask, atmospheric profiles, and land and snow cover data).
The MODIS/Terra V41 level-2 LST/E data (Short name: MOD11_L2) incorporate 1 km pixels, which are produced daily at 5-minute increments using the generalized split-window LST algorithm. This algorithm is optimally used to separate ranges of atmospheric column water vapor and lower boundary air surface temperatures into tractable sub-ranges. The surface emissivities in Bands 31 and 32 are estimated from land cover types.
The V41 MOD11_L2 data set comprises swath data obtained in 5-minute sensor collection periods, and includes the following Science Data Set (SDS) layers: LST, quality control assessment, error estimates, Bands 31 and 32 emissivities, zenith angle of the pixel view, observation time, and the geographic coordinates for every five scan lines and samples. Produced daily, MOD11_L2 is an unprojected level-2 data set, which provides the input for the level-3 products.
The V41 Terra/MODIS LST/E products, including the MOD11_L2, are validated to Stage-2 with well-defined uncertainties over a range of representative conditions. Further details regarding MODIS land product validation for the LST/E products are available from the MODIS land team validation site.
The V41 MOD11_L2 product’s acquisition range started January 1, 2007 (2007-001) and will continue until the V6 reprocessing completes in 2011. The V41 LST products from 2007-001 will remain consistent with similar products from V4, and hence are amenable to combine them in a time-series analysis. Users should exercise caution, and not mix the V4.x (i.e., V4 and V41) and V5 LST products in their analysis.
Data Set Characteristics
Area ~2330 km x 2000 km (Latitude/Longitude)
Image Dimensions 2030 x 1354 (Rows/Columns)
Map Projection None (Swath data)
File Size (Average) 2.2 MB
Data Format HDF-EOS
Number of Science Data Sets (SDS) 9
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Start Date: 1990-01-01Stop Date: 1994-01-01
ATMOSPHERE > PRECIPITATION > RAIN
BIOSPHERE > ECOLOGICAL DYNAMICS
HUMAN DIMENSIONS > SOCIAL BEHAVIOR
HUMAN DIMENSIONS > BOUNDARIES
HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION > URBANIZATION/URBAN SPRAWL
HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > WATER MANAGEMENT
HUMAN DIMENSIONS > INFRASTRUCTURE > TRANSPORTATION
LAND SURFACE > LANDSCAPE > LANDSCAPE MANAGEMENT
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
HUMAN DIMENSIONS > NATURAL HAZARDS > FAMINE
ISO Topic Category
Quality Please review the HIRDLS Data Description and Quality Version 7 Document for details on the quality of the data.
Use Constraints Please review the HIRDLS Data Description and Quality Version 7 Document for recommendations on the use of the data.
Data Set Progress
Distribution Media: FTP/HTTP
Distribution Size: 2 GB
Distribution Format: HDF-EOS5
Email: gille at ucar.edu
National Center for Atmospheric Research PO Box 3000
Province or State: Colorado
Postal Code: 80307
Phone: +44/0 1865 272926
Fax: +44/0 1865 272923
Email: gray at atm.ox.ac.uk
University of Oxford Department of Physics Clarendon Laboratory Parks Road
Postal Code: OX1 3PU
Country: UNITED KINGDOM
Role: DIF AUTHOR
Email: James.Johnson at nasa.gov
NASA Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
List of HIRDLS publications can be found at http://www.eos.ucar.edu/hirdls/docs/
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-04-30
Last DIF Revision Date: 2013-05-07