MODIS/Aqua Land Surface Temperature/Emissivity Daily 5-Min L2 Swath 1km


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EDG Data Set Name Granule Shortname

MODIS/Aqua Land Surface Temperature/Emissivity Daily 5-Min L2 Swath 1km MYD11_L2

Version Acquisition Range Science Quality Status

V003 March 6 2003 (2003065)- February 1 2004 (2004032) Provisional

V004 July 4 2002 (2002185) Validated Stage 1 as of July 4, 2002

Terra/MODIS Product Data Set Characteristics
Area = ~2330 x 2000 km
Image Dimensions = 2 (~2030x1354 row/column)
Average File Size = 26 MB
Resolution = 1 kilometer at nadir
Projection = None (swath data)
Land Surface Temperature (LST) Data Type = 16-bit Unsigned Integer
Emissivity Data Type = 8-bit Unsigned Integer
Data Format = HDF-EOS
Science Data Sets (SDS) = 9

Product Description
MODIS Land Surface Temperature and Emissivity (LST/E) products provide per-pixel temperature and emissivity values. Temperatures are extracted in Kelvin with a view-angle dependent algorithm applied to direct observations. This method yields 1 K accuracy for materials with known emissivities. The view angle information is included in each LST/E product. Emissivities are estimates derived from applying algorithm output to database information. The LST/E algorithms use MODIS data as input, including geolocation, radiance, cloud masking, atmospheric temperature, water vapor, snow, and land cover. The temperature products in turn are key inputs to many of the high level MODIS products and provide data for global temperature mapping and change observation. On land, soil and canopy temperature are among the main determinants of the rate of growth of vegetation and they govern seasonal start and termination of growth. Hydrologic processes such as evapotranspiration and snow and ice melt are highly sensitive to surface temperature fluctuation, which is also an important discriminating factor in classification of land surface types.

The above false-colored MYD11_L2 image shows the nighttime LSTs retrieved from Aqua MODIS data over the Caspian Sea, Persian Gulf and Gulf of Oman regions during five minutes of orbit starting at 21:45 on February 5, 2004. The pixels in black are in water or in areas covered by clouds, where there is no valid LST value in the MYD11_L2 product.

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 Add ADDITIONAL
OFFSET

Land-surface Temperature Kelvin 16-bit unsigned integer 0 7500 - 65535 0.0200 na

*Quality control for daytime LST and emissivity na 16-bit unsigned integer 0 0 - 255 na na

Land-surface Temperature Error Kelvin 8-bit unsigned integer 0 1 - 255 0.0400 na

Band 31 emissivity na 8-bit unsigned integer 0 1 - 255 0.0020 0.4900

Band 32 emissivity na 8-bit unsigned integer 0 1 - 255 0.0020 0.4900

Zenith angle of MODIS viewing at the pixel Degree 8-bit unsigned integer 0 0 - 180 0.5000 na

Time of Land-surface Temperature observation Hrs 8-bit unsigned integer 0 0 - 240 0.1000 na

Latitude of every 5 scan lines and 5 pixels Degree 32-bit floating point -999.9 -90.0 - 90.0 na na

Longitude of every 5 scan lines and 5 pixels Degree 32-bit floating point -999.9 -180 - 180 na na

*MODIS Land Surface Temperature/Emissivity QA Science Data Sets

View a Version Formatted for Printing

Retrieve the MYD11_L2v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MYD11_L2.4&group=MOLA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLA/MYD11_L2.004/

Order These Data through the EOS Data Gateway
MODIS/AQUA LAND SURFACE TEMPERATURE/EMISSIVITY 5-MIN L2 SWATH 1KM V004

EOS Data Gateway Search Tips

Source: Aqua

Sensor: MODIS

Dataset: MODIS/Aqua Land Surface Temperature/Emissivity 5-Min L2 Swath 1km

Geographic Extent: Type Lat/Long Range or Draw on Map

Temporal Extent: 2003-03-06 to 2004-02-01 (V003); 2002-07-04 to present (V004)

Product Information

Product Description
(http://landval.gsfc.nasa.gov/MODLAND/temp.htm)

User Guide
(http://www.icess.ucsb.edu/modis/LstUsrGuide/usrguide.html)

Algorithm Theoretical Basis Document (ATBD)
(http://modis.gsfc.nasa.gov/data/atbd/land_atbd.php)

MODIS Standard Data Products Catalog
(http://modis.gsfc.nasa.gov/data/dataprod/index.php)

EOS Data Products Handbook Volume 2 (2000)
(http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/data_products/vol2.php)

Contact Information

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Last Update: Monday, September 19, 2005
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