CHURCH OPAL: Surveillance of Shipping

Abstract

The CHURCH OPAL Exercise is one of a series of LRAPP Exercises designed specifically to acquire environmental acoustic data required for ASW program decisions. At-sea operations were conducted during September 1975 in a region of the Northeast Pacific Ocean. This exercise includes the following ocean acoustic experiments related to the Moored Surveillance System (MSS), the Sound Surveillance System (SOSUS), and the Surveillance Towed Array Sonar System (SURTASS): (1) Noise Floor Characteristics, (2) ASEPS Evaluation; Coherent Multi Array Processing, (3) Horizontal Directionality of Ambient Noise; Towed Array Performance. The objective of the Noise Floor Verification Experiment is to verify the noise floor concept. The noise floor is a depth below which distance shipping noise is significantly reduced and where short range acoustic sensors could attain a substantial performance gain.

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Document Details

Document Type
Technical Report
Publication Date
Jan 15, 1976
Accession Number
ADC007024

Entities

People

  • Allen E. Barnes
  • Lawrence A. Turk
  • Louis P. Solomon

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Aircrafts
  • Data Analysis
  • Databases
  • Dead Reckoning
  • Detection
  • High Resolution
  • Inertial Navigation
  • Inertial Navigation Systems
  • Measurement
  • Navigation
  • Over The Horizon Radar
  • Plastic Explosives
  • Radar
  • Radial Velocity
  • Sea Clutter
  • Surveillance

Readers

  • Acoustics.
  • Maritime and Naval Warfare Studies
  • Oceanography.