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MODIS/Terra Land Surface Temperature/Emissivity 5-Min L2 Swath 1km V041

Entry ID: MOD11_L241

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Summary

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

Related URL

Link: GET DATA > ON-LINE ARCHIVE

Description: The Data Pool (On-line Archive) provides access to all MODIS products, and a rolling archive of the ASTER level-1B products that cover the U.S. and its Territories.

Link: GET DATA > ECHO

Description: Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.

Link: VIEW PROJECT HOME PAGE

Description: 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 next generation Earth Science discovery tool (Reverb), which is a Web-based search, browse and order interface for a variety of EOS data sets.

Link: VIEW PROJECT HOME PAGE

Description: The MODIS Land home page is maintained through NASA's Goddard Space Flight Center and documents various aspects of the land portion of the MODIS program.

Geographic Coverage

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Spatial coordinates

N: 81.0

S: -81.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: Land Processes Distributed Active Archive Center

Dataset Title: MODIS/Terra Land Surface Temperature/Emissivity 5-Min L2 Swath 1km V041

Dataset Release Date: 2009

Dataset Release Place: Sioux Falls, South Dakota, USA

Dataset Publisher: U.S. Geological Survey

Data Presentation Form: Remote Sensing Image

Temporal Coverage

Start Date: 2007-01-01

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Data Resolution

Latitude Resolution: 1000 m
Longitude Resolution: 1000 m
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree

Science Keywords

LAND SURFACE > LAND TEMPERATURE > LAND SURFACE TEMPERATURE

LAND SURFACE > SURFACE RADIATIVE PROPERTIES > EMISSIVITY

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

GEOSCIENTIFIC INFORMATION

Platform

TERRA > Earth Observing System, TERRA (AM-1)

Instrument

MODIS > Moderate-Resolution Imaging Spectroradiometer

Project

EOSDIS > Earth Observing System Data Information System

ESIP > Earth Science Information Partners Program

CWIC > CEOS WGISS Integrated Catalog

Quality WARNING: EP TOMS started experiencing calibration problem since 2002. For data beginning in year 2000, the calibration has been stabilized relative to NOAA-16 SBUV/2 in the equatorial zone. Because of continuing changes in the optical properties of the front scan mirror that are not well understood, data are showing a latitude dependent error that cannot be corrected by a simple calibration correction. The calibration appears to be stable near the equator. But by 50 degrees latitude, there is now a -2% to -4% error in TOMS, a bit larger in the northern hemisphere than in the southern hemisphere. Because of this error, data since 2002 should NOT be used for trend analysis

Use Constraints EP TOMS started experiencing calibration problem since 2002. Because of the continuing changes in the optical properties of the front scan mirror that are not well understood, data started showing a latitude dependent error that cannot be corrected by a simple calibration correction. The calibration appears to be stable near the equator. But by 50 degrees latitude, there is now a -2% to -4% error in TOMS, a bit larger in the northern hemisphere than in the southern hemisphere.

Earth Probe TOMS data since 2002 should NOT be used for trend analysis because of the calibration problem.

Ancillary Keywords

Overpass Data

Total Column Ozone

UV Aerosol Index

UV Effective Surface Reflectivity

Data Set Progress

COMPLETE

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP Phone: 301-614-5224 Fax: 301-614-5268 Email: gsfc-help-disc at lists.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Distribution

Distribution Media: FTP/HTTP

Distribution Size: 120 MB

Distribution Format: ASCII

Fees: Free

Personnel

PAWAN K BHARTIA, PH. D

Role: INVESTIGATOR

Phone: 301-614-5731

Fax: 301-614-5903

Email: Pawan.K.Bhartia at nasa.gov

Contact Address:

NASA

Goddard Space Flight Center

Mailstop 613.3

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

Publications/References

Eck, T. F., Bhartia, P. K., Kerr, J. B., Satellite estimation of spectral UVB irradiance using TOMS derived total ozone and UV reflectivity, Geophy. Res. Letters 1995, 22, 611-614

Herman, J.R., et al., "Meteor-3 Total Ozone Mapping Spectrometer (TOMS) Data Products User's Guide." NASA reference publication 1393, 1996.

McPeters, R.D., et al., "Earth-Probe Total Ozone ...

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2011-02-23

Last DIF Revision Date: 2012-12-13

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