Lower atmosphere duct inversion method based on sparse external radiation source signals

Abstract

A lower atmosphere duct inversion method based on sparse external radiation source signals is disclosed. The method comprises: acquiring multiple types of external radiation source signals in a target sea area; extracting key observation features sensitive to a duct for each type of external radiation source signal, and processing to obtain an electromagnetic wave propagation loss vector in a duct environment; establishing a corresponding electromagnetic wave forward propagation model for each type of external radiation source signal, and obtaining an electromagnetic wave propagation loss vector at a receiving antenna corresponding to each type of external radiation source signal based on an atmospheric modified refractive index; establishing a multi-objective optimization function based on an average squared residual of the electromagnetic wave propagation loss vectors at the receiving antenna in the corresponding duct environment for all the various types of external radiation source signals.