抄録
Up to this time, the vessel-mounted pinger system is used in the passive ranging system. But when we need to estimate the running ability of the underwater vehicle easily and economically, we cannot use the vessel-mounted pinger system to be expensive. So that we must track down the running locus of the underwater vehicle from the radiated noise of the vehicle.
In this paper, I proposed the new passive ranging system which located the moving target. Then I computed of the time-delay difference on the output of a cross-correlation function between two radiated noise signals which were received by the acoustic sensors. And I solved three-dimensional equations for the acoustic velocity and these sensors' co-ordinates positions by the nonlinear least squares method.
Still more, I analysed the radiated noise signal of the target fishing boat which were collected in MITOHAMA test sea zone.
In view of these facts, the experimental result established the facts that this study's new passive ranging system can track down the running locus of the target vessel. Because I compared this study's system and the radio signal serveying system about the tracking result of the running locus of the target vessel, as summarize the results, I can explain the measured values by two different method almost agree for the running locus of the target vessel.
