A modified overlap-correlator method of forming a passive synthetic aperture is presented. The previously reported synthetic aperture technique called ETAM uses the overlap of the array in sequential positions to estimate a series of phase correction factors that compensate for the motion of the array over time. In addition, there exists a condition that the overlapped hydrophones among measurements of the moving towed array have the identical position in space. The proposed method does not require such limitations. Moreover, it increases the available number of the extended towed array data using a different set of phase correction factors calculated by the snapshots among measurements. As a result, the mean absolute error performance has been improved in bearing estimation for the array with extended aperture.
|Number of pages||4|
|Journal||Oceans Conference Record (IEEE)|
|Publication status||Published - 1999 Dec 1|
|Event||Proceedings of the OCEANS '99 MTS/IEEE - Riding the Crest into the 21st Century - Seattle, WA, USA|
Duration: 1999 Sep 13 → 1999 Sep 16
All Science Journal Classification (ASJC) codes