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  • Underwater Acoustics

    Acoustic Signature Classification System

    Search the database using any ship data

    Priority-based display on interest/threat level

    Stores images & sound files together with the same acoustic signatures

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    • Ability to perform rapid incremental searching of LOFAR, DEMON, Transient, intercept, and physical
    • Incorporates and stores new acoustic and other salient target related information (this may be done at sea or in port)
    • Operates on a standalone laptop PC or can be included as an integral part of Array Systems’ acoustic display processing software
    • Stores images and sound files together with the same acoustic signatures
    • Used and continuously updated by the Swedish Royal Navy for over 17 years - it is a proven technology
    • Saves the operator critical time in quickly classifying unknown targets currently being tracked
    • Easily incorporates and stores new acoustic, physical and other salient target related information - while at sea
    • Operates as a stand-alone application, or can be included as an integral part of Array’s acoustic display processing
  • The role of a sonar operator is to act as the eyes and ears of the ship by detecting and classifying unknown surface or submerged contacts. In order to maintain situational awareness, once an unknown target is detected, a classification must be done quickly. Unfortunately performing accurate classification based on acoustical analysis is time-consuming and difficult. In addition to the identification of a target, often the problem presented to the operator is of a surveillance nature.

    Array’s Acoustic Signature Classification Software was developed to aid the sonar operator to quickly search though a database of known acoustic signatures to arrive at a correct classification. The software is derived from the HYDAB classification software that has been in use in the Royal Swedish Navy’s submarines and surface ships for over 17 years. It is a very effective classification tool that has been continually refined and updated though years of ‘at sea training’ and operational missions.

  • Acoustic Displays
    The shore processing facility houses the processor and the displays. The processor runs on standard PC COTS devices and uses an open architecture platform with well-defined open standard interfaces. Array provides a customizable display layout so that it may be configured to best match a user’s current MMI requirements. The signal processing algorithms proposed here are the same ones that have been proven to be effective in handling sonar systems for the Swedish Royal Navies’ Gotland and Germany’s U212 submarines. Specifically the operator workstations will provide:
    • Tactical Display
    • Detection & Tracking
    • Conventional and Adaptive Beamforming
    • Broadband Processing
    • Narrowband Processing
  • The classification database allows an operator to perform manual match-comparisons using the values automatically retrieved from cursors on Array’s sonar processing software SAPPS possible to save searches and analyze several targets in parallel without having to re-enter new values when returning to a search later.

    ASCS supports incremental search and tolerance on search parameters. It is also possible to undo search steps incrementally. Targets in the search results are displayed by priority based on interest/threat in decrementing order.

    While the ASCS can operate as a standalone component, it can also interface to Array's Post Analysis System.

    For Narrowband, Intercept, DEMON and Transient Analysis, it is possible to export cursor readouts and segments of the plots automatically to the ASCS with a single mouse click. The ASCS supports storing harmonics information and exporting it to the Sonar Displays to be displayed on a plot.