Method and device for generating original echoes of synthetic aperture radar

The invention provides an original echo generation method and device for a synthetic aperture radar, and relates to the technical field of ocean engineering, and the method comprises the steps: obtaining an ocean scene simulation parameter of a to-be-processed sea area; obtaining a simulation moment of a target azimuth of the sea area to be processed, calculating a time-varying propagation coefficient based on the sea scene simulation parameter and the simulation moment of the target azimuth, and calculating a target parameter based on the time-varying propagation coefficient; based on the target parameters and the scattering model, constructing a target matrix of the target azimuth; based on the target matrix, combining the target echo intensity values of the target azimuth to obtain original echo data of the target azimuth; and repeating the above steps until the original echo data of all the azimuths of the processed sea area are obtained, and determining the original echo data of the sea area to be proces