A method for estimating and correcting the time and phase references of nonsynchronous SAR data, the nonsynchronous SAR data being captured and provided as an image or images by a bistatic or multistatic radar system, wherein based on an exclusive analysis of information of the SAR data, a residual clock-phase error within the SAR data is estimated and corrected, wherein the following steps are performed iteratively once or several times: a) Correction of the time and phase references (S11; S21) of the received SAR data by processing the estimated residual clock-phase error for correcting the estimated clock phase error or that has been determined in a previous iterative step, whereby a new time reference is obtained; b) Generation of an SAR image (S12; S22) by processing the new time reference, a reconstruction of the geometric data captured by the radar system taking place in the process; c) Estimation of the residual clock-phase error (S13; S23, S24, S25) of the SAR image generated at step b); characterized in that - in step c), the estimation of the residual clock-phase error is performed by way of a comparison with a reference SAR image that does not have a clock-phase error, a two-dimensional distortion of the SAR image generated at step b) being determined with regard to the reference SAR image and the estimation of the residual clock-phase error being carried out by inverting the determined distortion; - the distortion in the azimuth direction is determined in accordance with the following formula: Δ t a, clock t r, t a ≈ λ 2 ⋅ a 2 t r, t a Δ f 0, clock t r, t a wherein a 2 (t r, t a) corresponds to the quadratic coefficient of the range history of the particular pixel (t r, t a) and Δ f 0, clock ( t r, t a) is the current frequency offset; and - the distortion in the range direction is determined in accordance with the following formula: Δ t r, clock t r, t a ≈ λ c ⋅ Δ φ clock t r, t a 2 π wherein Δ φ clock ( t r, t a) is an echo window. a) Correction of the time and phase references (S11; S21) of the received SAR data by processing the estimated residual clock-phase error for correcting the estimated clock phase error or that has been determined in a previous iterative step, whereby a new time reference is obtained; b) Generation of an SAR image (S12; S22) by processing the new time reference, a reconstruction of the geometric data captured by the radar system taking place in the process; c) Estimation of the residual clock-phase error (S13; S23, S24, S25) of the SAR image generated at step b); - in step c), the estimation of the residual clock-phase error is performed by way of a comparison with a reference SAR image that does not have a clock-phase error, a two-dimensional distortion of the SAR image generated at step b) being determined with regard to the reference SAR image and the estimation of the residual clock-phase error being carried out by inverting the determined distortion; - the distortion in the azimuth direction is determined in accordance with the following formula: Δ t a, clock t r, t a ≈ λ 2 ⋅ a 2 t r, t a Δ f 0, clock t r, t a - the distortion in the range direction is determined in accordance with the following formula: Δ t r, clock t r, t a ≈ λ c ⋅ Δ φ clock t r, t a 2 π wherein Δ φ clock ( t r, t a) is an echo window.