Correction of located points in a hyperbolical locating system with a short-baseline plane array

Here is reported an iteration method,which corrects the coordinatesof an underwater moving target obtained by a hyperbolic locating system with ashort-baseline plane array when the sound velocity varies with depth.A seriesof differential difference equations are used for determining the iterative values.The calculated results show that under the same conditions,the location error isabout several meters or tens of meters without correction and less than 0.5 mwith correction.The method can be applied to various types of arrays.