ASTER L1A Reconstructed Unprocessed Instrument Data V003

Description

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Level 1A (AST_L1A) contains reconstructed, instrument digital numbers (DNs) derived from the acquired telemetry streams of the telescopes: Visible and Near Infrared (VNIR), Shortwave Infrared (SWIR), and Thermal Infrared (TIR). Additionally, geometric correction coefficients and radiometric calibration coefficients are calculated and appended to the metadata but not applied. The AST_L1A 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* 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.Improvements/Changes from Previous Version* Geometric correction to account for Earth's rotation angle and nutation.* Geometric correction for geolocation errors associated with nighttime TIR scenes.* Radiometric correction to account for degradation of onboard calibration lamps.* Starting June 23, 2021, radiometric calibration coefficient Version 5 (RCC V5) will be applied to newly observed ASTER data and archived ASTER data products. Details regarding RCC V5 are described in the following journal article. * Tsuchida, S., Yamamoto, H., Kouyama, T., Obata, K., Sakuma, F., Tachikawa, T., Kamei, A., Arai, K., Czapla-Myers, J.S., Biggar, S.F., and Thome, K.J., 2020, Radiometric Degradation Curves for the ASTER VNIR Processing Using Vicarious and Lunar Calibrations: Remote Sensing, v. 12, no. 3, at https://doi.org/10.3390/rs12030427.

Resources

Name Format Description Link
5 https://doi.org%2F10.5067%2FASTER%2FAST_L1A.003
5 https://lpdaac.usgs.gov%2F
5 https://asterweb.jpl.nasa.gov%2F
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DC14758250-LPDAAC_ECS
5 https://lpdaac.usgs.gov%2Fdocuments%2F70%2FAST_L1_ATBD.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F69%2FAST_L1_User_Guide_V3.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F175%2FASTER_L1_Product_Specifications.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F1319%2FASTER_User_Handbook_v4.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F1661%2FASTER_SWIR_User_Advisory_Jan_12_2009.pdf
5 https://e4ftl01.cr.usgs.gov%2FWORKING%2FBRWS%2FBrowse.001%2F2021.06.16%2Fpg-BR1A0000-2021061601_032_012.1.TIR.jpg
5 https://www.earthdata.nasa.gov%2Fcenters%2Flp-daac
33 ASTER_L1_Product_Specifications.pdf https://lpdaac.usgs.gov/documents/175/ASTER_L1_Product_Specifications.pdf
33 AST_L1_ATBD.pdf https://lpdaac.usgs.gov/documents/70/AST_L1_ATBD.pdf
21 AST_L1A.003 https://doi.org/10.5067/ASTER/AST_L1A.003
22 pg-BR1A0000-2021061601_032_012.1.TIR.jpg https://e4ftl01.cr.usgs.gov/WORKING/BRWS/Browse.001/2021.06.16/pg-BR1A0000-2021061601_032_012.1.TIR.jpg
33 ASTER_User_Handbook_v4.pdf https://lpdaac.usgs.gov/documents/1319/ASTER_User_Handbook_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
33 AST_L1_User_Guide_V3.pdf https://lpdaac.usgs.gov/documents/69/AST_L1_User_Guide_V3.pdf
5 https://www.earthdata.nasa.gov/centers/lp-daac
5 https://asterweb.jpl.nasa.gov/
5 https://search.earthdata.nasa.gov/search?q=C14758250-LPDAAC_ECS

Tags

  • earth-science-infrared-wavelengths-spectral-engineering-reflected-infrared
  • earth-science-visible-wavelengths-spectral-engineering-visible-imagery
  • earth-science-infrared-wavelengths-spectral-engineering-thermal-infrared

Topics

Categories