OLCI Level 1B Full Resolution (version BC004) - Sentinel-3 - Reprocessed

OLCI (Ocean and Land Colour Instrument) Full Resolution: 300m at nadir. Level 1 products are calibrated Top Of Atmosphere radiance values at OLCI 21 spectral bands. Radiances are computed from the instrument digital counts by applying geo-referencing, spectral calibration adjusted for wavelength evolution with time, radiometric processing (non-linearity correction, smear correction, dark offset correction, absolute calibration adjusted for radiometric evolution with time), and the correction for straylight effects in OLCI cameras’ spectrometer and ground imager. Per-pixel uncertainties are included in the reprocessed timeseries. Additionally, spatial resampling of OLCI pixels to the 'ideal' cross-track grid, initial pixel classification, and annotation at tie points with auxiliary meteorological data and acquisition geometry are provided. The radiance parameters are accompanied by error estimate parameters. The Solar Irradiance Reference Spectrum is based on TSIS-1 (Coddington et al, 2021) and was updated for this reprocessing from Thuillier et al, 2003. Sentinel-3 is part of a series of Sentinel satellites, under the umbrella of the EU Copernicus programme. This collection contains reprocessed data from baseline collection 004. Operational data can be found in the corresponding collection.OLCI（海洋与陆地颜色仪器，Ocean and Land Colour Instrument）全分辨率数据：星下点分辨率为300米。一级产品为经过定标的大气层顶辐射亮度值，覆盖OLCI的21个光谱波段。辐射亮度值由仪器数字计数计算得到，处理流程包括地理配准、随时间演化的波长光谱定标修正、辐射定标处理（非线性校正、拖影校正、暗偏移校正、随时间辐射演化修正后的绝对定标），以及OLCI相机光谱仪与地面成像仪的杂散光效应校正。逐像素不确定性参数已纳入再处理时间序列中。此外，本数据集还提供OLCI像素到"理想"跨轨网格的空间重采样结果、初始像素分类结果，以及结合辅助气象数据与成像几何参数的连接点标注信息。辐射亮度参数配套包含误差估计参数。太阳辐照度参考光谱基于TSIS-1（Coddington等人，2021年），并针对本次再处理工作从Thuillier等人2003年的研究成果进行了更新。 哨兵-3号属于哨兵卫星系列的一员，隶属于欧盟哥白尼计划。 本数据集集合包含来自基准集合004的再处理数据，业务化数据可在对应的数据集合中获取。

搜集汇总

背景与挑战

背景概述

该数据集是Sentinel-3卫星OLCI仪器的Level 1B全分辨率再处理数据（版本BC004），提供21个光谱波段、300米空间分辨率的校准大气层顶辐射值，并包含辐射校正和像素级不确定性信息。数据覆盖2016年至2024年全球范围，主要用于海洋生物地球化学和水质等主题研究。