Accurate calibration is a requirement of many array signal processing techniques. We investigate the calibration
of a transducer array using time delays. We derive a strategy based on the mean square error criterion and
discuss how time delays that are not available can be interpolated from existing ones. The proposed method is
made robust to noise and model mismatch by means of a novel iterative technique for distance matrix denoising.
The convergence of the method is proved. Finally, the accuracy of the proposed calibration algorithm is assessed
both in simulated scenarios and using experimental data obtained from an ultrasound scanner designed for breast