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Description

The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Level 1B (AST_L1B) Registered Radiance at the Sensor data product is radiometrically calibrated and geometrically co-registered. Application of intra-telescope and inter-telescope registration corrections for all bands are relative to the reference band for each telescope: Visible and Near Infrared (VNIR) Band 2, Shortwave Infrared (SWIR) Band 6, and Thermal Infrared (TIR) Band 11. The AST_L1B product has a spatial resolution of 15 meters (m) for the VNIR bands, 30 m for the SWIR bands, and 90 m for the TIR bands.

Known Issues

  • The QAPERCENTINTERPOLATEDDATA field in .met files was found to be inconsistent due to a software upgrade. Following evaluation by the ASTER Science Team, it was determined to have no impact on science data and has been set to 0 and nullified.
  • SWIR data acquired after April 2008 may exhibit anomalous saturation and striping. Users should consult the ASTER SWIR User Advisory for additional details.

Improvements/Changes from Previous Versions

  • Radiometric Calibration Update: Version 4 applies Radiometric Calibration Coefficient Version 5 (RCC V5) to improve the radiometric accuracy of the raw DNs, based on research by Tsuchida and others (2020), published in Remote Sensing.

Product Summary

Platforms
Terra
Instruments
ASTER
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
15 Meters x 15 Meters
30 Meters x 30 Meters
90 Meters x 90 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2000-03-04 to Present
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC) ,
Ground Data System, Japan Space Systems, National Institute of Advanced Industrial Science and Technology, Ministry of Economy, Trade, and Industry, Japan (JP/METI/AIST/JSS/GDS)
Concept ID
C3306888201-LPCLOUD
Data State
ACTIVE
Number of Files/Granules
4770481
Processing Level
1B
Published
Updated
Science Keywords
REFLECTED INFRARED ,
THERMAL INFRARED ,
VISIBLE IMAGERY ,
Visible Radiance

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team. (2025). ASTER L1B Registered Radiance at the Sensor V004 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/ASTER/AST_L1B.004 Date Accessed: 2025-12-26

File Naming Convention

AST_L1B_00401242021232347_20250912150246.hdf

The file name begins with the Product Short Name (AST_L1B), followed by the 3-digit Version Number plus the Date and Time of Acquisition designated as MMDDYYYYHHMMSS (00401242021232347), Date and Time of Processing designated as YYYYMMDDHHMMSS (20250912150246), and the Data Format (hdf).

Documents

Publications Citing This Dataset

Filters
Title Year Author
Geochemical and hydrothermal alteration patterns of the Abrisham-Rud Porphyry Copper District, Semnan Province, Iran Timkin, T.
Multisource and temporal thermal infrared remote sensing of Hasandağ Stratovolcano (Central Anatolia, Turkey) Auiusoy, İ.
Optically thin clouds in the trades Mieslinger, T.
Using remote sensing data for geological mapping in semi-arid environment—A machine learning approach El Fels, A. E.
Remote sensing-based mapping of the Wadi Sa'al-Wadi Zaghara basement rocks, southern Sinai, Egypt Ali-Bik, M. W.
Integration of concentration-area fractal model and relative absorption band depth method for mapping hydrothermal alterations using ASTER data Masoumi, M.
Subpixel temperature estimation by information transfer with adaptive ensemble extreme learning machine (IT-AEELM) Hu, Y.
Mineral-bearing alteration zones at Gebel Monqul area, North Eastern Desert, Egypt, using remote sensing and gamma-ray spectrometry data Hegab, M. A. E.
Integrated spectral analysis of ASTER and gamma-ray spectrometric data to delineate alteration minerals for uranium exploration in Gabal Khashm El-Risha area, North Eastern Desert, Egypt Badr, Y. S.
Synergistic use of ASTER, L-band ALOS PALSAR, and hyperspectral AVIRIS-NG data for exploration of lode type gold deposit - A study in Hutti Maski Schist Belt, India Guha, A.
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Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
SWIR_Band4 30 meter resolution SWIR Band 4 (1.600 to 1.700 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
SWIR_Band5 30 meter resolution SWIR Band 5 (2.145 to 2.185 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
SWIR_Band6 30 meter resolution SWIR Band 6 (2.185 to 2.225 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
SWIR_Band7 30 meter resolution SWIR Band 7 (2.235 to 2.285 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
SWIR_Band8 30 meter resolution SWIR Band 8 (2.295 to 2.365 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
SWIR_Band9 30 meter resolution SWIR Band 9 (2.360 to 2.430 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
TIR_Band10 90 meter resolution TIR Band 10 (8.125 to 8.475 µm) W/m²/sr/μm uint16 N/A 0 to 65535 N/A
TIR_Band11 90 meter resolution TIR Band 11 (8.475 to 8.825 µm) W/m²/sr/μm uint16 N/A 0 to 65535 N/A
TIR_Band12 90 meter resolution TIR Band 12 (8.925 to 9.275 µm) W/m²/sr/μm uint16 N/A 0 to 65535 N/A
TIR_Band13 90 meter resolution TIR Band 13 (10.25 to 10.95 µm) W/m²/sr/μm uint16 N/A 0 to 65535 N/A
TIR_Band14 90 meter resolution TIR Band 14 (10.95 to 11.65 µm) W/m²/sr/μm uint16 N/A 0 to 65535 N/A
VNIR_Band1 15 meter resolution VNIR Band 1 (0.52 to 0.60 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
VNIR_Band2 15 meter resolution VNIR Band 2 (0.63 to 0.69 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
VNIR_Band3B 15 meter resolution VNIR Band 3B (0.78 to 0.86 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
VNIR_Band3N 15 meter resolution VNIR Band 3 (0.78 to 0.86 µm) W/m²/sr/μm uint8 N/A 0 to 255 N/A
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