Seafloor mapping using interferometric sonars

Summary of interferometer attributes:• Wide field of view (>240degrees)• Data density similar to digital side scan• Simultaneous bathymetry and side scan• Swath width is insensitive to roll• Higher data density away from nadir• Limited range due to signal to noise requirement for phasemeasurements• High data density but phase noise means processing is neededto get accurate seafloor depths• Able to be implemented in compact, robust, low power form- Particularly suitable for shallow water surveys from small vessels/ 10 / 30-Nov-09