Scattering by pure seawater: Effect of salinity, Optics Express, Vol. 17, No. 7, 5698-5710

code to calculate (betasw,beta90sw,bsw) as a function of (lambda,tc,theta,s,delta) where lambda (nm): wavelength tc: temperauter in degree celsius, must be a scalar s: salinity, must be scalar delta: depolarization ratio, if not provided, default = 0.039 will be used. betasw: volume scattering at angles defined by theta. its size is [x y], where x is the number of angles (x = length(theta)) and y is the number of wavelengths in lambda (y = length(lambda)) beta90sw: volume scattering at 90 degree. its size is [1 y] bw: total scattering coefficient. its size is [1 y] for backscattering coefficients, divide total scattering by 2

计算代码用于确定(betasw, beta90sw, bsw)作为(λ, tc, θ, s, δ)的函数，其中λ(单位：nm)为波长，tc为温度（摄氏度），必须为标量，s为盐度，必须为标量，δ为去极化比，如未提供，则默认值为0.039。betasw：由θ定义的角度处的体积散射。其大小为[x y]，其中x为角度的数量（x = θ的长度），y为λ中的波长数量（y = λ的长度）。beta90sw：90度处的体积散射。其大小为[1 y]。bw：总散射系数。对于后向散射系数，总散射系数除以2。