N: 83 S: -83 E: 180 W: -180
Description
The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Surface Radiance VNIR and SWIR (AST_09) contains atmospherically corrected data for the Visible and Near Infrared (VNIR) and Shortwave Infrared (SWIR) sensors. Both the VNIR and SWIR data are atmospherically corrected and are generated using the bands of the corresponding ASTER Level 1B image.
The AST_09 product has a spatial resolution of 15 meters (m) for the VNIR bands and 30 m for the SWIR bands.
Known Issues
- Level 2 products that are on the international date line/anti-meridian have incorrect bounding coordinates for the UTM zone defined in the file metadata.
- SWIR data acquired after April 2008 may exhibit anomalous saturation and striping. Users should consult the ASTER SWIR User Advisory for additional details.
Version Description
Product Summary
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
File Naming Convention
The file name begins with the Product Short Name (AST_09), followed by the 3-digit Version Number plus the Date and Time of Acquisition designated as MMDDYYYYHHMMSS (00412082020214052), Date and Time of Processing designated as YYYYMMDDHHMMSS (20250912142915), Product Type (SRA), Band Type (VNIR), Band/Variable (B01), and the Data Format (tif).
Documents
USER'S GUIDE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
GENERAL DOCUMENTATION
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | 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 | int16 | N/A | 0 to 32767 | 0.2174 |
| SWIR_Band5 | 30 meter resolution SWIR Band 5 (2.145 to 2.185 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.0696 |
| SWIR_Band6 | 30 meter resolution SWIR Band 6 (2.185 to 2.225 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.0625 |
| SWIR_Band7 | 30 meter resolution SWIR Band 7 (2.235 to 2.285 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.0597 |
| SWIR_Band8 | 30 meter resolution SWIR Band 8 (2.295 to 2.365 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.04178 |
| SWIR_Band9 | 30 meter resolution SWIR Band 9 (2.360 to 2.430 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.0318 |
| VNIR_Band1 | 15 meter resolution VNIR Band 1 (0.52 to 0.60 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.676 |
| VNIR_Band2 | 15 meter resolution VNIR Band 2 (0.63 to 0.69 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.708 |
| VNIR_Band3N | 15 meter resolution VNIR Band 3 (0.78 to 0.86 µm) | W/m²/sr/μm | int16 | N/A | 0 to 32767 | 0.862 |