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USGS Landsat 9 集合 2 第 1 层级原始场景
Landsat 9 集合 2 第 1 层级数字值,表示经过缩放和校准的传感器端辐射度。数据质量最高的 Landsat 场景会被划分到第 1 层级,并且被视为适合进行时间序列处理分析。第 1 层级包括经过处理的第 1 级精确地形 (L1TP) 数据,具有以下特点: c2 global l9 landsat lc9 oli-tirs -
USGS Landsat 9 集合 2 第 2 层级原始场景
Landsat 9 集合 2 第 2 层级数字值,表示经过缩放和校准的传感器端辐射度。在处理过程中,如果场景不符合第 1 层级的条件,则会被分配到第 2 层级。这包括系统地形 (L1GT) 和系统 (L1GS) 处理的场景,以及不符合以下条件的任何 L1TP 场景: c2 global l9 landsat lc9 oli-tirs -
USGS Landsat 9 集合 2 第 2 层级 TOA 反射率
Landsat 9 集合 2 第 2 层级校准的对流层顶 (TOA) 反射率。校准系数会从图片元数据中提取。如需详细了解 TOA 计算,请参阅 Chander 等人 (2009) 的论文。在处理过程中,如果场景不符合第 1 层级的条件,则会被分配到第 2 层级。这包括系统性… c2 全球 l9 Landsat lc9 卫星图像
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) |"]]