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Scènes brutes de la collection 2 de Landsat 9 de l'USGS, niveau 1
Valeurs DN de niveau 1 de la collection 2 de Landsat 9, représentant la radiance au niveau du capteur, mise à l'échelle et calibrée. Les scènes Landsat dont la qualité des données est la plus élevée sont placées dans le niveau 1 et sont considérées comme adaptées à l'analyse de traitement des séries temporelles. Le niveau 1 comprend les données traitées au niveau 1 Precision Terrain (L1TP) qui ont … c2 global l9 landsat lc9 oli-tirs -
Scènes brutes de la collection 2 de Landsat 9 de l'USGS, niveau 2
Valeurs DN de niveau 2 de la collection 2 de Landsat 9, représentant la radiance au niveau du capteur, mise à l'échelle et calibrée. Les scènes qui ne répondent pas aux critères de niveau 1 lors du traitement sont attribuées au niveau 2. Cela inclut les scènes traitées en mode systématique (L1GT) et systématique (L1GS), ainsi que les scènes L1TP qui ne … c2 global l9 landsat lc9 oli-tirs -
Réflectance TOA de la collection 2 de Landsat 9 de l'USGS, niveau 2
Réflectance au niveau de l'atmosphère (TOA) calibrée de la collection 2 de Landsat 9, niveau 2 Les coefficients de calibrage sont extraits des métadonnées de l'image. Pour en savoir plus sur le calcul de la TOA, consultez Chander et al. (2009). Les scènes qui ne répondent pas aux critères de niveau 1 lors du traitement sont attribuées au niveau 2. Cela inclut Systematic … c2 global l9 landsat lc9 imagerie satellite
Datasets tagged lc9 in Earth Engine
[null,null,[],[[["\u003cp\u003eThis page provides access to USGS Landsat 9 Collection 2 data, including Tier 1 and Tier 2 raw scenes, and Tier 2 top-of-atmosphere (TOA) reflectance.\u003c/p\u003e\n"],["\u003cp\u003eLandsat 9 Collection 2 Tier 1 data represents the highest quality scenes suitable for time-series analysis, while Tier 2 includes scenes that did not meet Tier 1 criteria.\u003c/p\u003e\n"],["\u003cp\u003eBoth Tier 1 and Tier 2 raw scenes provide scaled, calibrated at-sensor radiance, represented as Digital Number (DN) values.\u003c/p\u003e\n"],["\u003cp\u003eLandsat 9 Collection 2 Tier 2 TOA reflectance data is calibrated and derived from the image metadata, offering insights into surface reflectance.\u003c/p\u003e\n"]]],["Landsat 9 Collection 2 data is categorized into Tiers 1 and 2. Tier 1 includes scenes with the highest data quality, suitable for time-series analysis, and are represented by Level-1 Precision Terrain (L1TP) processed data. Tier 2 data, including Systematic terrain (L1GT) and Systematic (L1GS) processed scenes, do not meet Tier 1 standards. Tier 2 also includes top-of-atmosphere (TOA) reflectance data with calibration coefficients extracted from image metadata.\n"],null,["# Datasets tagged lc9 in Earth Engine\n\n-\n\n |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | [### USGS Landsat 9 Collection 2 Tier 1 Raw Scenes](/earth-engine/datasets/catalog/LANDSAT_LC09_C02_T1) |\n | 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 ... |\n | [c2](/earth-engine/datasets/tags/c2) [global](/earth-engine/datasets/tags/global) [l9](/earth-engine/datasets/tags/l9) [landsat](/earth-engine/datasets/tags/landsat) [lc9](/earth-engine/datasets/tags/lc9) [oli-tirs](/earth-engine/datasets/tags/oli-tirs) |\n\n-\n\n |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | [### USGS Landsat 9 Collection 2 Tier 2 Raw Scenes](/earth-engine/datasets/catalog/LANDSAT_LC09_C02_T2) |\n | 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 ... |\n | [c2](/earth-engine/datasets/tags/c2) [global](/earth-engine/datasets/tags/global) [l9](/earth-engine/datasets/tags/l9) [landsat](/earth-engine/datasets/tags/landsat) [lc9](/earth-engine/datasets/tags/lc9) [oli-tirs](/earth-engine/datasets/tags/oli-tirs) |\n\n-\n\n |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | [### USGS Landsat 9 Collection 2 Tier 2 TOA Reflectance](/earth-engine/datasets/catalog/LANDSAT_LC09_C02_T2_TOA) |\n | 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 ... |\n | [c2](/earth-engine/datasets/tags/c2) [global](/earth-engine/datasets/tags/global) [l9](/earth-engine/datasets/tags/l9) [landsat](/earth-engine/datasets/tags/landsat) [lc9](/earth-engine/datasets/tags/lc9) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) |"]]