OLCI Level 2 Ocean Colour Reduced Resolution in NRT - Sentinel-3

OLCI (Ocean and Land Colour Instrument) Ocean Colour Geophysical Products. Reduced Resolution: 1200m at nadir. All Sentinel-3 NRT products are available at pick-up point in less than 3h. Level 2 marine products include the following: * water-leaving reflectances in 16 bands, Oa**_reflectance (Baseline Atmospheric Correction (BAC) algorithm, bands: 400, 412, 442, 490, 510, 560, 620, 665, 674, 681, 709, 754, 779, 865, 885, 1024 nanometer (nm)); *algal pigment concentration in clear waters, chl_oc4me (BAC and maximum band ratio algorithm, log10 scaled); *algal pigment concentration in turbid waters, chl_nn (neural net algorithm, log10 scaled); *total suspended matter concentration, tsm_nn (neural net algorithm, log10 scaled); *diffuse attenuation coefficient Kd of downward irradiance at 490 nm, trsp (BAC and M07 algorithm, log10 scaled); *absorption coefficient at 443 nm of coloured detrital and dissolved organic matter, iop_nn (neural net algorithm, log10 scaled); *instantaneous photosynthetically active radiation, PAR (BAC and clear-sky ocean algorithm); *aerosol optical thickness T865 and aerosol Angstrom exponent A865, w_aer (BAC algorithm, A for bands 779 and 865 nm) *integrated water vapour column, iwv (1D-Var algorithm). The geophysical products are accompanied by error estimate products. Pixel classification, quality and science flags, as well as meteorological, geometry and geolocation data at tie points are provided. Sentinel-3 is part of a series of Sentinel satellites, under the umbrella of the EU Copernicus programme.OLCI（海洋与陆地颜色成像仪，Ocean and Land Colour Instrument）海洋颜色地球物理产品。其星下点分辨率缩减为1200米。所有哨兵3号（Sentinel-3）近实时（Near Real Time，NRT）产品均可在3小时内于数据取件节点获取。Level 2级海洋产品包含以下内容： * 16个波段的离水反射率：Oa**_反射率（基线大气校正（Baseline Atmospheric Correction，BAC）算法，覆盖波段为400、412、442、490、510、560、620、665、674、681、709、754、779、865、885、1024纳米（nm））； * 清洁水体藻类色素浓度：chl_oc4me（采用基线大气校正与最大波段比算法，经log10对数缩放）； * 浑浊水体藻类色素浓度：chl_nn（采用神经网络（neural net）算法，经log10对数缩放）； * 总悬浮颗粒物浓度：tsm_nn（采用神经网络算法，经log10对数缩放）； * 490纳米处下行辐照度的漫衰减系数Kd：trsp（采用基线大气校正与M07算法，经log10对数缩放）； * 有色碎屑与溶解有机物在443纳米处的吸收系数：iop_nn（采用神经网络算法，经log10对数缩放）； * 瞬时光合有效辐射：PAR（采用基线大气校正与晴空海洋算法）； * 865纳米处气溶胶光学厚度T865与气溶胶安格斯特指数A865：w_aer（采用基线大气校正算法，对应波段为779与865纳米）； * 整层大气水汽柱含量：iwv（采用一维变分（1D-Var）算法）。 该地球物理产品配套误差估计产品。同时提供像元分类、质量与科学标识，以及格网点处的气象、几何与地理定位数据。哨兵3号是欧盟哥白尼计划（Copernicus programme）旗下一系列哨兵卫星（Sentinel satellites）中的一员。