Method for making spaceborne SAR (Synthetic Aperture Radar) image map

The invention relates to the technical field of orthoimage manufacturing methods, and discloses a spaceborne SAR image manufacturing method, which comprises the following steps of S1, establishing an RD model according to an SAR parameter file; s2, generating a simulated SAR image; s3, registration is carried out through the simulated SAR image and the real SAR image; according to the spaceborne SAR image map making method, an RD model is established according to an SAR parameter file, azimuth time t and a slope distance R are solved through iteration, then coordinates of a simulated SAR image corresponding to each pixel are calculated, the simulated SAR image is generated, registration is carried out through the simulated SAR image and a real SAR image, then the corresponding relation between a ground point and the real SAR image is established, and the image map of the spaceborne SAR is obtained. And finally, through determination of a gray value, correction work is indirectly completed, ortho-rectification