VIIRS KD(490) diffuse attenuation coefficients for study sites

This csv dataset contains diffuse attenuation coefficients (units: m-1) from the Visible Infrared Imaging Radiometer Suite (VIIRS) Kd(490) product. The values are from the nearest corresponding pixels from the fifteen study sites associated with visited by projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019. These attenuation coefficients were generated by the NOAA CoastWatch/OceanWatch program. They are remote sensing estimates of diffuse attenuation coefficients at a 490 nm wavelength in for approximately 4x4 km cells using the algorithm described in (Wang et al., 2017). The dataset includes January-February-March (JFM), October-November-December (OND) as well as October to March averages for each site. OND averages are not available for all sites and therefore are not included in the October-March averages. An indication of the distance from the site to the nearest pixel with a Kd(490) observation is noted. Wang, M., X. Liu, L. Jiang, and S. Son. 2017. Algorithm Theoretical Basis Document (ATBD), The VIIRS Ocean Color Products, Algorithm Theoretical Basis Document Version 1.0.本CSV数据集包含可见光红外成像辐射计套件（Visible Infrared Imaging Radiometer Suite，VIIRS）Kd(490)产品的漫衰减系数（单位：m⁻¹）。该数据提取自2019年4月至5月期间ARSV Laurence M. Gould号科考航次LMG 19-04中，由ANT-1744550、ANT-1744570、ANT-1744584及ANT-1744602等项目考察的15个研究站点的最近邻对应像素值。 该批漫衰减系数由美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）CoastWatch/OceanWatch项目组生成，为基于Wang等人2017年提出的算法，对约4×4 km像元内490 nm波长处漫衰减系数的遥感反演结果。 本数据集包含各站点的1-2-3月（JFM）、10-11-12月（OND）以及10月至3月的季平均数据。但并非所有站点均具备OND季平均数据，因此10月至3月的季平均数据中未包含OND季平均项。数据集同时标注了各站点与其对应Kd(490)观测最近像素之间的距离。 参考文献：Wang M, Liu X, Jiang L, Son S. 2017. VIIRS海洋水色产品算法理论基础文档（Algorithm Theoretical Basis Document，ATBD）版本1.0。