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Description

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Expedited Level 1B Registered Radiance at the Sensor global 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 Expedited Level 1B data product is similar to the (AST_L1B) with a few notable exceptions. These include:

  • The AST_L1BE is available for download within 48 hours of acquisition in support of field calibration and validation efforts, in addition to emergency response for natural disasters where the quick turn-around time from acquisition to availability would prove beneficial in initial damage or impact assessments.
  • The registration quality of the AST_L1BE is likely to be lower than the AST_L1B, and may vary from scene to scene.
  • The AST_L1BE dataset does not contain the VNIR 3B (aft-viewing) Band.
  • This dataset does not have short-term calibration for the Thermal Infrared (TIR) sensor.

Known Issues

  • Users are advised that ASTER SWIR data acquired from April 2008 to the present exhibit anomalous saturation of values and anomalous striping. This effect is also present for some prior acquisition periods. Please refer to the ASTER SWIR User Advisory for more details.
  • Data acquisition gaps: On November 28, 2024, one of Terra's power-transmitting shunt units failed. As a result, there was insufficient power to maintain functionality of the ASTER instrument. ASTER resumed acquisitions for the VNIR bands on January 18, 2025, and for the TIR bands on April 15, 2025. Users should note the data gap in ASTER acquisitions from November 28, 2024, through January 16, 2025, for VNIR observations, and a gap from November 28, 2024, through April 15, 2025, for TIR acquisitions.

Product Summary

Platforms
Terra
Instruments
ASTER
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Spatial Resolution
15 Meters x 15 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2000-03-04 to Present
Temporal Resolution
1 Day
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
c179460406-lpdaac_ecs
Data State
ACTIVE
Processing Level
1B
Published
Updated

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. (2001). Expedited ASTER Level 1B Data Set Registered Radiance at the Sensor [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/ASTER/AST_L1BE.003 Date Accessed: 2025-07-10

Data Center Citation

NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team. 2001. Expedited ASTER Level 1B Data Set Registered Radiance at the Sensor. Sioux Falls, South Dakota, USA: NASA EOSDIS Land Processes Distributed Active Archive Center. https://doi.org/10.5067/ASTER/AST_L1BE.003.

Documents

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD) The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
DATA PRODUCT SPECIFICATION The ASTER Level-1 Product Specification provides a description of the data file.
GENERAL DOCUMENTATION ASTER SWIR User Advisory
USER'S GUIDE ASTER Level-1 User Guide
USER'S GUIDE ASTER Higher-Level Product User Guide

Learning Resources

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