ASTER Surface Radiance Data with VNIR and SWIR Bands

ASTER L2 Surface Radiance VNIR and Crosstalk Corrected SWIR V004 contains atmospherically corrected data from the Terra satellite's ASTER instrument. The product provides surface radiance measurements at 15-meter resolution for VNIR bands and 30-meter resolution for SWIR bands. It is produced by LPCLOUD using data from the NASA ASTER Level 1B product.

Use Cases

• Analyze land surface temperature and emissivity using the atmospherically corrected SWIR band radiance values.
• Monitor vegetation health and biomass by comparing radiance levels across specific VNIR spectral bands.
• Perform mineralogical mapping and geological studies by examining the spectral signatures in the corrected VNIR and SWIR data.
• Assess surface albedo and radiative properties from the calibrated radiance measurements in the 15-meter VNIR bands.

Strengths

• Data is atmospherically corrected, providing surface-level radiance values for direct analysis.
• VNIR bands offer high spatial resolution of 15 meters per pixel.
• Correction process addresses crosstalk in SWIR bands, improving data fidelity for affected periods.

Limitations

• SWIR detectors ceased functioning in January 2009, making recent SWIR data unavailable.
• A known data acquisition gap exists from November 28, 2024, to January 16, 2025, for VNIR observations.
• SWIR data from April 2008 to January 2009 exhibits anomalous saturation and striping, affecting usability.

Provenance

Source

NASA Terra satellite Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument.

Collection Method

Atmospheric correction applied to Level 1B radiance data using corresponding sensor bands.

Time Range

Coverage spans the ASTER operational lifetime, with specific sensor anomalies noted from 2008-2009 and 2024-2025.

Freshness

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Geography

Global coverage from the Terra satellite's orbit.