All 500 sets of data used in theoretical fitting

Dependence of refractive index (RI) of seawater on salinity, temperature and wavelength n (S, T, λ) in infrared band is required.However, almost all the existing empirical formulas of the RI of seawater are suitable for the visible waveband (400 nm - 700 nm). There is little report on developing the RI expression of seawater in infrared band, especially the most commonly used 1200 nm - 1650 nm waveband. So, the n (S, T, λ) expression in infrared band is developed before establishing the VSM and verified through different ways (such as transmission spectrum and sensitivity).This dataset includes all 500 sets of data used in theoretical fitting to obtain the n (S, T, λ) expression.