AI-generated Key Takeaways
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The datasets provide Landsat 9 Collection 2 data, including raw scenes at different processing tiers (Tier 1 and Tier 2) and Tier 2 top-of-atmosphere (TOA) reflectance.
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Tier 1 scenes represent the highest quality data suitable for time-series analysis, while Tier 2 scenes may have limitations.
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Landsat 9 data includes global coverage and utilizes the Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS).
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Raw scenes provide scaled, calibrated at-sensor radiance (DN values), while TOA reflectance data is calibrated to represent reflectance at the top of the atmosphere.
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USGS Landsat 9 Collection 2 Tier 1 Raw Scenes
Landsat 9 Collection 2 Tier 1 DN values, representing scaled, calibrated at-sensor radiance. Landsat scenes with the highest available data quality are placed into Tier 1 and are considered suitable for time-series processing analysis. Tier 1 includes Level-1 Precision Terrain (L1TP) processed data that have … c2 global l9 landsat lc9 oli-tirs -
USGS Landsat 9 Collection 2 Tier 2 Raw Scenes
Landsat 9 Collection 2 Tier 2 DN values, representing scaled, calibrated at-sensor radiance. Scenes not meeting Tier 1 criteria during processing are assigned to Tier 2. This includes Systematic terrain (L1GT) and Systematic (L1GS) processed scenes, as well as any L1TP scenes that do not … c2 global l9 landsat lc9 oli-tirs -
USGS Landsat 9 Collection 2 Tier 2 TOA Reflectance
Landsat 9 Collection 2 Tier 2 calibrated top-of-atmosphere (TOA) reflectance. Calibration coefficients are extracted from the image metadata. See Chander et al. (2009) for details on the TOA computation. Scenes not meeting Tier 1 criteria during processing are assigned to Tier 2. This includes Systematic … c2 global l9 landsat lc9 satellite-imagery