YAW-COMPENSATED CORRELATING SONAR TRACKING SYSTEM

摘要

Yaw correction and "noise rejection are achieved in a sonar detection system. The system uses a pair of phased hydrophone arrays located a fixed distance apart along the keel of a ship. The transducer elements of each array are phased and combined to produce pairs of overlapping beams, each beam pair being oriented along a respective azimuth relative to the line joining the two arrays. The signals received by a selected pair of beams of the phased arrays are quantized and sampled before being cross-correlated to determine the precise bearing of the signal source (target) within the directive beams of the arrays. A compensatin. delay is inserted in the signal data derived from the array having the shorter propagational path to the underwater sound source. The inserted delay is such that signals from a target on the crossover axis of the beams would be brought into time coincidence at the inputs to the signal correlator. experienced by the ship.