Target Range Estimation Method using Ghost Target in the Submarine Linear Array Sonar

Choi, Byungwoong; Kim, Kyubaek

doi:2015.18.5.532

J. KIMS Technol > Volume 18(5); 2015 > Article

Journal of the Korea Institute of Military Science and Technology 2015;18(5):532-537.
DOI: https://doi.org/10.9766/KIMST.2015.18.5.532

Target Range Estimation Method using Ghost Target in the Submarine Linear Array Sonar

Byungwoong Choi, Kyubaek Kim

¹Naval/System Research Center, Hanwha Thales Co,. Ltd.
²The Naval Combat Systems PEO, Agency for Defense Development

잠수함 선배열소나의 허위표적 정보를 이용한 표적의 거리추정 기법

최병웅, 김규백

¹한화탈레스(주) 해양/시스템연구소
²국방과학연구소 함정전투체계단

Abstract

In this paper, we propose target range estimation method using ghost target in the submarine linear array sonar. Usually, when submarine detect target, they use passive sonar detection to avoid self-disclosure by active sonar transmission. But, originally, passive linear array sonar have limitation for target range estimation and additional processing is required to get target range information. For the case of near-field target, typical range estimation method is using multiple information by multipath effect in underwater environment. Acoustic signal generated from target are propagated along with numerous multipath in underwater environment. Since multipath target signals received in the linear array sonar have different conic angles each other, ghost target is appeared at the bearing different with real target bearing and sonar operator can find these information on the operation console. Under several assumption, this geometric properties can be analysed mathematically and we get the target range by derivation of this geometric equations using measured conic angles of real target and ghost target.

Key Words: Submarine, Linear Array Sonar, Range Estimation, Multipath, Ghost Target