Apparent Optical Properties DOORS cruise 3, 01-20 June, 2024

Apparent Optical Properties of seawater determined from multispectral free-fall system (MicroPro, Satalantic Inc) during R/V Mare Nigrum cruise #3 at 11 stations mostly located in Georgian coastal Black Sea waters . The MicroPro simultaneously measure the upwelling radiance Lu (z, λ), the downward irradiance Ed (z, λ) and the upward irradiance Eu (z, λ) as a function of depth z and wavelength λ, in addition to the above–water downward irradiance Ed (0+λ). All applied sensors (i.e., radiometers of the OCR-507) have equivalent spectral channels with 10 nm bandwidth centered at the nominal wavelengths 412, 443, 490, 510, 555, 665, and 683 nm. Data products from the free-fall optical profilers include spectral values of: remote sensing reflectance and diffuse attenuation coefficient.本数据集为“马尔·尼格伦号”（R/V Mare Nigrum）第3次科考航次中，利用多光谱自由下落系统（MicroPro，Satalantic公司）测得的黑海格鲁吉亚沿岸海域11个站位的海水表观光学特性，站位主要分布于黑海格鲁吉亚近海水域。该MicroPro系统可同步测量随深度z与波长λ变化的上行辐亮度（upwelling radiance）Lu(z,λ)、下行辐照度（downward irradiance）Ed(z,λ)及上行辐照度（upward irradiance）Eu(z,λ)，同时还可获取水面以上下行辐照度Ed(0+,λ)。本次搭载的所有传感器（即OCR-507型辐射计）均配备等效光谱通道，通道带宽为10 nm，中心标称波长分别为412、443、490、510、555、665与683 nm。该自由下落光学剖面仪生成的数据产品包含遥感反射率（remote sensing reflectance）与漫衰减系数（diffuse attenuation coefficient）的光谱数值。