Surface currents imaged with hybrid along and cross track interferometry

Radar interferometry is known to be a useful technique for mapping terrain heights and surface currents. Several studies on along track or cross track interferometry provided highly accurate results. In the case of coastal applications a simultaneous measurement of topography and surface currents is beneficial. Therefore an approach for airborne interferometric measurements with a baseline consisting of an along and cross track component is presented. Analysis of experimental airborne interferometric data shows good results. The final accuracy is highly dependent on the accuracy of the navigation data of the aircraft.