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MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid V041
Entry ID: MYD11A1

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 V41 LST/E Daily L3 Global 1 Km Grid (Short name: MYD11A1) products incorporate 1-km pixels, which are produced daily 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 Aqua/MYD11A1 products are projected in a Sinusoidal grid by mapping the level-2 LST product (MYD11_L2) on 1-kilometer (precisely 0.928-km) grids. The MYD11A1 product comprises the following Science Data Set (SDS) layers for daytime and nighttime observations: LSTs, quality control assessments, observation times, view zenith angles, clear sky coverages, and bands 31 and 32 emissivities from land cover types.

The V41 MODIS LST/E products, including MYD11A1, are validated to Stage-1. Further details regarding MODIS land product validation is available from the following URL:

This product is ready for use in science applications/publications. Subsequent and improved versions of this product also exist.

The V41 MYD11A1 product’s acquisition range started January 1, 2007 (2007-001) and will continue until the V6 reprocessing completes in late 2010. 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: 1200 x 1200 rows/columns
File Size: 24 MB
Resolution: ~1 kilometer (actual: 0.93km)
Projection: Sinusoidal
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 12

Purpose: Science Research

Related URL
Link: View Related Information
Description: Data set landing page at the LP DAAC

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Description: Interface to search, discover, and access EOS data products, and invoke available data services.

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Description: LP DAAC Data Pool provides direct access to all currently available MODIS products and the ability to download them via HTTP.

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Description: The MODIS Reprojection Tool on the Web (MRTWeb) is available for selected MODIS land products. MRTWeb’s capabilities include reprojecting to alternate map projections, spatial and spectral subsetting, resampling, and alternate output format options.

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Description: USGS EarthExplorer (EE) provides users the ability to query, search and order archived ASTER and MODIS products available from the LP DAAC. Registered users of EE have access to additional features than guest users.

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Description: The USGS Global Visualization Viewer (GloVis) is an online search and order tool driven by browse images. Users may select any geographical area of interest (for any given product) and view all available browse images for that area before deciding to order those products.

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Description: The Land Processes Distributed Active Archive Center (LP DAAC) is one of several discipline-specific data centers within the NASA Earth Observing System Data and Information System (EOSDIS). The LP DAAC Web page provides information about available data products, services, documentation, order interfaces, and tools.

Link: View Related Information
Description: The MODIS Land home page is maintained through NASA's Goddard Space Flight Center and documents various aspects of the land component of the MODIS mission.

Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Version: 041

Temporal Coverage
Start Date: 2002-05-04

Science Keywords

ISO Topic Category

AQUA >Earth Observing System, AQUA    [Information]

MODIS >Moderate-Resolution Imaging Spectroradiometer    [Information]

Data Set Progress

Creation and Review Dates
DIF Creation Date: 2008-11-12
Last DIF Revision Date: 2016-01-27

Link to Web Site