Short-range parametric location system for autonomous underwater vehicles underice functioning
The impulse parametric sonars structural schemes for the interfaces detection, recognition and classification by amplitude, phase and frequency features of several echo signals at primary pump, sum and difference frequencies, and second harmonic components are considered. Safety navigation supplying for autonomous underwater vessel under the ice cover, ice thickness gauging above the vessel, the patches of ice-free water detection in icefields, which is suitable for emersion etc by means of these equipment are suggested.