APL-UW Deep Water Propagation: Philippine Sea Signal Physics and North Pacific Ambient Noise

Abstract

Grant involved two inter-related ASW components: signal and noise. Analysis of signal datasets from PhilSea09 and PhilSea10 showed (1) small biases in Munk-Zachariasen and Flatte-Dashen predictions of log-amplitude variance at 284~Hz at 107~km, (2) Flatte-Dashen prediction of pulse spread at 200~Hz and 300~Hz at 510~km was quite accurate (vice findings at lower frequencies and larger ranges) (3) observed pulse intensity distribution at 200~Hz and 510~km (near exponential) not consistent with observed pulse spread (very small). Low-Frequency ambient noise from 1994-2007 is decreasing at seven receivers throughout the N. Pacific. Further ambient noise collection suspended by US Navy.

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 2015
Accession Number
AD1011426

Entities

People

  • Rex K. Andrew

Organizations

  • Johns Hopkins University Applied Physics Laboratory

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  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors
  • Space
  • Weapons Technologies

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  • Environmental science

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