異経路呼によるトランスポンダ応答とこれを用いた曳航体位置推定について

抄録

An acoustic transponder navigation system is used for positioning of a deep-tow system. The navigation system utilizes travel-time of acoustic pulse through the direct path to know a distance, because the direct wave does not decay a lot and is observed as the first arrival. A wave pulse propagating another path is, however, detected at the surface. The experiment carried out during the test operation of a deep-tow system shows the following results: (1) a relay transponder responds to interrogation pulses propagating through a direct path and another path, (2) response pulses propagating through a dirct path are observed at the surface, and (3) a reflected pulse of the response at the surface is detected at the deep-tow system. This evidence tells us that exhaustion of a battery of a transponder must be estimated based on multi-response to an interrogation, and the following possible use: (1) as an inverted echo sounder, and (2) positioning of a deep-tow system using multiresponse.