AST_08 v003

ASTER L2 Surface Kinetic Temperature


PI: U.S./Japan ASTER Science Team

Description

The ASTER Surface Kinetic Temperature (AST_08) is generated using the five Thermal Infrared (TIR) bands (acquired either during the day or night time) between 8 and 12 µm spectral range. It contains surface temperatures at 90 m spatial resolution for the land areas only. Surface kinetic temperature provides a vital input to studies of volcanism, thermal inertia, surface energy, and high-resolution mapping of fires. This product is derived using the same algorithm as the ASTER Surface Emissivity AST_05 Product.

Surface kinetic temperature is determined by applying Planck's Law using the emissivity values from the Temperature/Emissivity Separation (TES) algorithm, which uses atmospherically corrected ASTER surface radiance (TIR) data. The TES algorithm first estimates emissivity in the TIR channels using the Normalized Emissivity Method (NEM). These estimates are used along with Kirchoff's Law to account for the land-leaving TIR radiance that is due to sky irradiance. That figure is subtracted from TIR radiance iteratively to estimate the emitted radiance from which temperature is calculated using the NEM module.

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Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionTerra ASTER
DOI10.5067/ASTER/AST_08.003
File Size~3 MB
Temporal ResolutionOther
Temporal Extent2000-03-04 to Present
Spatial ExtentGlobal
Coordinate SystemUniversal Transverse Mercator (UTM)
DatumWorld Geodetic System (WGS84)
File FormatHDF-EOS
Geographic Dimensions~60 km x 60 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers1
Columns/Rows700 x 830
Pixel Size90 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
KineticTemperature Surface kinetic temperature composite Kelvin 16-bit unsigned integer N/A N/A 200 to 3200 0.1

Documentation

Using the Data

E-Learning

Observing Land from Space: Interacting with Geospatial Data from NASA's LP DAAC

View from NASA Terra's Zoom Lens: All About the ASTER Sensor

Data In Action

Highlights from the NASA DEVELOP National Program Spring 2017 Term

Sensing Our Planet: NASA Earth Science Research Features 2014

Highlights from the Literature: October to December 2014

Tools

Citation

DOI: 10.5067/ASTER/AST_08.003

About the Image

Terra ASTER surface kinetic temperature data from the AST_08 product over Guatemala on January 8, 2018.

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