ASTER L2 Surface Radiance VNIR and Crosstalk Corrected SWIR V004

Description

The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Surface Radiance VNIR and Crosstalk Corrected SWIR (AST_09XT) contains atmospherically corrected data for the Visible and Near Infrared (VNIR) and Shortwave Infrared (SWIR) sensors. The AST_09XT product has a spatial resolution of 15 meters (m) for the VNIR bands and 30 m for the SWIR bands. Both the VNIR and the SWIR data are atmospherically corrected using the corresponding bands from an ASTER [Level 1B](https://doi.org/10.5067/ASTER/AST_L1B.004) image.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.Improvements/Changes from Previous Versions* SWIR Crosstalk Correction: Applies a correction to reduce stray light effects in the SWIR bands, enhancing data quality by minimizing artifacts. Enhanced Atmospheric Correction: Version 4 uses Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) data as the primary source for atmospheric parameters (ozone, water vapor, pressure, and temperature), improving the precision of emissivity calculations. Fallback Mechanisms: When MERRA-2 data are unavailable, the product employs Global Data Assimilation System (GDAS) data as a backup, with climatology data serving as a final fallback to ensure continuous processing. 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)](https://doi.org/10.3390/rs12030427), published in Remote Sensing.

Resources

Name Format Description Link
5 https://lpdaac.usgs.gov%2Fdocuments%2F76%2FAST_09_ATBD.pdf
5 https://asterweb.jpl.nasa.gov%2F
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DC3306887285-LPCLOUD
5 https://lpdaac.usgs.gov%2Fdocuments%2F1319%2FASTER_User_Handbook_v4.pdf
5 https://data.lpdaac.earthdatacloud.nasa.gov%2Flp-prod-public%2FAST_09XT.004%2FAST_09XT_00410032004184440_20250401142018%2FAST_09XT_00410032004184440_20250401142018.jpg
5 https://lpdaac.usgs.gov%2Fdocuments%2F2243%2FASTER_User_Guide_V4.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F1661%2FASTER_SWIR_User_Advisory_Jan_12_2009.pdf
5 https://lpdaac.usgs.gov%2F
5 https://doi.org%2F10.5067%2FASTER%2FAST_09XT.004
5 https://lpdaac.usgs.gov%2Fdocuments%2F75%2FAST_09_User_Guide_V3.pdf
5 https://www.earthdata.nasa.gov%2Fcenters%2Flp-daac
5 https://search.earthdata.nasa.gov/search?q=C3306887285-LPCLOUD
5 https://www.earthdata.nasa.gov/centers/lp-daac
5 https://asterweb.jpl.nasa.gov/
21 AST_09XT.004 https://doi.org/10.5067/ASTER/AST_09XT.004
33 AST_09_ATBD.pdf https://lpdaac.usgs.gov/documents/76/AST_09_ATBD.pdf
33 AST_09_User_Guide_V3.pdf https://lpdaac.usgs.gov/documents/75/AST_09_User_Guide_V3.pdf
33 ASTER_User_Handbook_v4.pdf https://lpdaac.usgs.gov/documents/1319/ASTER_User_Handbook_v4.pdf
22 AST_09XT_00410032004184440_20250401142018.jpg https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/AST_09XT.004/AST_09XT_00410032004184440_20250401142018/AST_09XT_00410032004184440_20250401142018.jpg
33 ASTER_User_Guide_V4.pdf https://lpdaac.usgs.gov/documents/2243/ASTER_User_Guide_V4.pdf
33 ASTER_SWIR_User_Advisory_Jan_12_2009.pdf https://lpdaac.usgs.gov/documents/1661/ASTER_SWIR_User_Advisory_Jan_12_2009.pdf

Tags

  • earth-science-infrared-wavelengths-spectral-engineering-infrared-flux
  • earth-science-visible-wavelengths-spectral-engineering-visible-flux
  • earth-science-infrared-wavelengths-spectral-engineering-infrared-radiance
  • earth-science-visible-wavelengths-spectral-engineering-visible-radiance
  • earth-science-infrared-wavelengths-spectral-engineering-infrared-imagery
  • earth-science-visible-wavelengths-spectral-engineering-visible-imagery

Topics

Categories