MYD11B1_041

MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 5km SIN Grid V041

Version 041
  • Abstract
    The MODIS/Aqua 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 from MODIS/Aqua data acquisition date 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/Aqua V4 LST/E L3 Global 5 km Grid product (Short name: MYD11B1) incorporates 5-km pixels, which is produced using the day/night LST algorithm (Wan and Li, 1997). This algorithm extracts average temperatures (in Kelvin) and applies them to a pair of MODIS daytime and nighttime observations. This method yields 1 K accuracy for materials with known emissivities. The six thermal band emissivities are estimated through a classification-based look-up table (LUT). The data inputs include the MODIS L1B calibrated and geolocated radiances, geolocation, cloud mask, atmospheric profiles, land and snow cover. The V41 MYD11B1 products are a gridded version of the level-2 LST product (MYD11_L2) mapped and projected on 5-kilometer (precisely 4.63 km) Sinusoidal grids. The MYD11B1 product comprises the following Science Data Set (SDS) layers for daytime and nighttime observations: LSTs, quality control assessments, observation times, view zenith angles, and emissivities from bands 20, 22, 23, 29, 31, and 32. It also includes daytime and nighttime LSTs generated from the 1-km, band 31 of the level-2 MYD11_L2 product aggregated to 5 km grids. The V41 Aqua/MODIS LST/E products, including MYD11B1, are validated to Stage-1 with well-defined uncertainties over a range of representative conditions. Further details regarding MODIS land product validation for the LST/E products is available from the following URL: http://landval.gsfc.nasa.gov/ProductStatus.php?ProductID=MYD11 This product is ready for use in science applications/publications. Subsequent and improved versions of this product also exist. The V41 MYD11B1 product’s acquisition range started January 1, 2007 (2007-001), and continued through March 30, 2017. 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. V041 Data Set Characteristics: Area: ~1100 x 1100 km Image Dimensions: 240 x 240 rows/columns File Size: ~1.9 MB Resolution: ~5 kilometers (actual 4.63 km) Projection: Sinusoidal Data Format: HDF-EOS Science Data Sets (SDS HDF Layers): 17
  • Purpose
    Science Research
  • Version Description
    Collection Version 4.1 Processing and Reprocessing

Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    3

    Sensor Measurements

    Quality
    Collection Progress

    Complete

    Access Constraints

    None

Related URLs
    Science Keywords
    • EARTH SCIENCE
    • LAND SURFACE
    • SURFACE THERMAL PROPERTIES
    • LAND SURFACE TEMPERATURE
    • EARTH SCIENCE
    • LAND SURFACE
    • SURFACE RADIATIVE PROPERTIES
    • EMISSIVITY

Acquisition Information Fields:

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Platforms
  • Earth Observation Satellites
    Aqua
    Instruments
    • MODIS

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL Universal Transverse Mercator (UTM) CARTESIAN GEODETIC
    Tiling Identification Systems
    System Name Coordinate 1 Min Coordinate 1 Max Coordinate 2 Min Coordinate 2 Max
    MODIS Tile SIN 0.0 35.0 0.0 17.0
Location Keywords

Data Centers

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  • LP DAAC
    ARCHIVER
    Land Processes Distributed Active Archive Center

    U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
    Sioux Falls, South Dakota 57198

    M-F, 8 a.m. to 4 p.m. Central Time
    • 605-594-6116
    • 605-594-6963
    • Email
    Contact Details

    None

  • NASA/GSFC/SED/ESD/HBSL/BISB/MODAPS
    PROCESSOR
    MODIS Adaptive Processing System, Biospheric Information Systems Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

    NASA/GSFC Code 922
    GREENBELT, Maryland 20771

    Contact Details

    Contact for data content concerns

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Collection Citations Fields:

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