Ocean temperature inversion method based on Brillouin laser radar

The invention relates to a Brillouin laser radar-based ocean temperature inversion method. The method comprises the following steps of: constructing a polynomial temperature inversion model of ocean temperature about the frequency shift size and the line width of a laser radar Brillouin scattering signal; according to a Brillouin frequency shift temperature-salinity model, obtaining a group of data with temperature, salinity and laser radar Brillouin scattering signal frequency shift corresponding to each other; a Brillouin line width temperature-salinity model obtains a group of data with temperature, salinity and laser radar Brillouin scattering signal line width corresponding to each other; according to mutually corresponding data of temperature, laser radar Brillouin scattering signal frequency shift size and laser radar Brillouin scattering signal line width, a coefficient of a polynomial temperature inversion model is fitted by adopting an LM method, and the polynomial temperature inversion model is det