2019_programme: THE CTBTO ACOUSTIC MONITORING SYSTEM AND DATA ANALYSIS POTENTIAL

• Session: 08. Comprehensive nuclear test-ban treaty monitoring
  Organiser(s): Haralabus George, Zampolli Mario, Nielsen Peter
• Lecture: THE CTBTO ACOUSTIC MONITORING SYSTEM AND DATA ANALYSIS POTENTIAL [invited]
  Paper ID: 882
  Author(s): Bradley David L., Eller Anthony I.
  Presenter: Eller Anthony
  Presentation type: oral
  Abstract: Several environmental and acoustic data logging systems have been deployed at sites throughout the world’s oceans under the auspices of the Comprehensive Test Ban Treaty Organization (CTBTO) for the purpose of monitoring the presence of illegal nuclear testing. The data acquired include several years of continuously sampled high resolution, reliable measurements of ambient noise from 1 to about 125 Hz. Data from three of these sites – Wake Is., Ascension Is. and Diego Garcia -- have been made available to US scientists for analysis. At each of these sites, two sets of three hydrophones were deployed at the sound channel axis depth. Noise data were sampled at a rate of 250 Hz and, after application of the A-D conversion and calibrations, noise time series data were Fourier Transformed to provide the noise spectral density. Investigation of the statistical properties of the noise at very low frequencies has resulted in confidence that the noise due to specific forcing functions; wind, e.g., can be isolated. Initial analysis of the fluctuations at the low frequency end of the spectrum over a ten-year period near Wake Island show strong correlation with lunar and solar influences, as well as a strong correlation with local wind speed.
• Corresponding author: Dr Eller Anthony
  Affiliation: Applied Ocean Sciences
  Country: United States
  e-mail: