[Parameters: Topic='SPECTRAL/ENGINEERING', Term='INFRARED WAVELENGTHS', Variable_Level_1='INFRARED IMAGERY']
ASTER On-Demand L2 Surface Radiance TIREntry ID: AST_09T
Abstract: The ASTER On-Demand L2 Surface Radiance TIR is an on-demand product generated using the five thermal infra-red (TIR) Bands (acquired either during the day or night time) between 8 and 12 µm spectral range. It provides surface-leaving radiance for the TIR Bands at 90 meters spatial resolution, which includes both surface-emitted and surface-reflected components. It also provides the down-welling ... sky irradiance values (in w/m2/µm) for each of the TIR Bands. This product is atmospherically corrected, and the surface-leaving radiance is of known accuracy and valid only for clear-sky scenes (cloud-free pixels). This atmospherically corrected product provides the input for generating two other higher-level products: surface spectral emissivity and surface kinetic temperature.
The algorithm to correct atmospheric effects involves 2 elements: 1) It uses a radiative transfer model which is capable of estimating the magnitude of atmospheric emission, absorption, and scattering. It uses Modtran (Moderate Resolution Transmittance Code) radiative transfer model, which calculates atmospheric transmittance and radiance for frequencies from 0 to 50,000 cm-1 at moderate spectral resolution. 2) It identifies and incorporates all the necessary atmospheric parameters applicable to the location and time for which the measurements require correction. These include temperature, water vapor, elevation, ozone, and aerosols.
V002 data set release date: 2001-03-28
V003 data set release date: 2002-05-03
The key determinants between these versions are the use of a newer algorithm with an improved set of radiometric calibration and geometric correction coefficients databases in version 003.
Data Set Characteristics:
Area: ~60 km x 60 km
Image Dimensions: 700 rows x 830 columns
File Size: ~14 Megabytes
Units: w/m2/sr/µm surface radiance, w/m2/µm sky irradiance
Projection: Universal Transverse Mercator (UTM)
Data Format: HDF-EOS or GeoTIFF
Vgroup Data Fields: 5 surface radiance, 5 sky irradiance
Data Set Citation
Dataset Originator/Creator: Land Processes Distributed Active Archive Center (LP DAAC)
Dataset Title: ASTER On-Demand L2 Surface Radiance TIR
Dataset Release Date: 2001-03-28
Dataset Release Place: Sioux Falls, South Dakota, USA
Dataset Publisher: U.S. Geological Survey
Version: V002, V003Online Resource: https://lpdaac.usgs.gov
Start Date: 2000-03-12
Latitude Resolution: 90m
Longitude Resolution: 90m
Horizontal Resolution Range: 30 meters - < 100 meters
ISO Topic Category
Quality Sensor anomalies may be present.
Access Constraints See https://lpdaac.usgs.gov/customer_service/aster_access_notice for data access information.
Use Constraints See https://lpdaac.usgs.gov/products/aster_policies for redistribution and citation policies.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 14 MB
Distribution Format: HDF-EOS, GeoTIFF
Role: TECHNICAL CONTACT
Phone: (Toll Free) (866) 573-3222
Phone: (605) 594-6116
Fax: (605) 594-6963
Email: LPDAAC at usgs.gov
LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center 47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) publication references: [available online at http://asterweb.jpl.nasa.gov/asterbiblio20120719.pdf]
National Aeronautics and Space Administration, revised 2006, EOS Reference Handbook, a Guide to NASA's Earth Science Enterprise and the Earth Observing System: Greenbelt, Maryland, Goddard Space Flight Center, 261 p. [available online in pdf format at http://eospso.gsfc.nasa.gov/sites/default/files/publications/2006Re...].
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2002-08-06
Last DIF Revision Date: 2013-08-26