Passive geoacoustic inversion with a single hydrophone using broadband ship noise

Gervaise, Cédric; Kinda, Bazile; Bonnel, Julien; Stéphan, Y.; Vallez, Simon

doi:10.1121/1.3672688

Cited by 43 publications

(21 citation statements)

References 41 publications

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“…Ship noise has already been used to localize hydrophone arrays (Ebbeson et al 2008;Morley et al 2009). In single sensor setups, measuring the distance of a ship knowing the instrument location has also been successful (Gao et al 2008;Ferguson et al 2017) along with geoacoustic inversion of the ocean bottom, on which the instrument was resting on (Gervaise et al 2012). To our knowledge, however, no study has yet published an end-to-end solution to orient and/or localize an isolated OBS on the ocean floor using ship noise and its corresponding ship AIS locations.…”

Section: Ship Noise As a Source Of Opportunitymentioning

confidence: 99%

Orienting and locating ocean-bottom seismometers from ship noise analysis

Trabattoni

Barruol

Dreo

et al. 2019

Geophysical Journal International

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Summary Breakthroughs in understanding the structure and dynamics of our planet will strongly depend upon instrumenting deep oceans. Progress has been made these last decades in ocean-bottom seismic observations, but ocean-bottom seismometer (OBS) temporary deployments are still challenging and face set-up limitations. Launched from oceanographic vessels, OBSs fall freely and may slightly drift laterally, dragged by currents. Therefore, their actual orientation and location on the landing sites are hard to assess precisely. Numerous techniques have been developed to retrieve this key information, but most of them are costly, time-consuming or inaccurate. In this work, we show how ship noise can be used as an acoustic source of opportunity to retrieve both the orientation and the location of OBSs on the ocean floor. To retrieve the OBS orientation, we developed a first method based on a combination of seismic and pressure data through the use of the acoustic intensity. This latter can be used to quantify the OBS orientation from the ship noise direction of arrival (DOA), which can then be compared with known ship trajectories obtained from the automatic identification system (AIS). To accurately relocate OBSs, we also developed a second method based on the hydrophone data which computes distances of acoustical sources by measuring time differences of arrival (TDOA) between direct and reverberated phases. The OBS location is then retrieved by fitting measured ship distances with known ship trajectories. In this study, a full network of OBSs deployed in the SW Indian Ocean was reoriented and a test station was relocated. We demonstrate that our new methods may quantify the OBS orientation with an accuracy of about one degree, and its location with an accuracy of a few tens of metres, depending on the number of ships used in the analysis.

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Section: Ship Noise As a Source Of Opportunitymentioning

confidence: 99%

Orienting and locating ocean-bottom seismometers from ship noise analysis

Trabattoni

Barruol

Dreo

et al. 2019

Geophysical Journal International

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“…1-14 Furthermore, low SNR methods are attractive due to their ability to use low powered sources, e.g., battery powered acoustic sources, 15 resulting in less disturbance to marine mammals. 4 This paper focuses on matched field inversion for mobile, single source-receiver configurations in low SNR conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Using relative dispersion curves combined with waveguide invariant principles, ship noise data is inverted for a simple Pekeris waveguide in Ref. 4 using just one receiver with a few dB SNR. Other dispersion based inversions 1-3 are done using imploding glass bulbs or air guns (impulsive sources).…”

Section: Introductionmentioning

confidence: 99%

Broadband synthetic aperture geoacoustic inversion

Tan

Gerstoft²,

Yardim³

et al. 2013

The Journal of the Acoustical Society of America

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A typical geoacoustic inversion procedure involves powerful source transmissions received on a large-aperture receiver array. A more practical approach is to use a single moving source and/or receiver in a low signal to noise ratio (SNR) setting. This paper uses single-receiver, broadband, frequency coherent matched-field inversion and exploits coherently repeated transmissions to improve estimation of the geoacoustic parameters. The long observation time creates a synthetic aperture due to relative source-receiver motion. This approach is illustrated by studying the transmission of multiple linear frequency modulated (LFM) pulses which results in a multi-tonal comb spectrum that is Doppler sensitive. To correlate well with the measured field across a receiver trajectory and to incorporate transmission from a source trajectory, waveguide Doppler and normal mode theory is applied. The method is demonstrated with low SNR, 100-900 Hz LFM pulse data from the Shallow Water 2006 experiment.

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“…6 For a broadband source, the time delays between multipath arrivals can be obtained from the received signal's autocorrelation functions. Using these time delays, the source location can be determined using a single hydrophone.…”

Section: Introductionmentioning

confidence: 99%

Moving source localization with a single hydrophone using multipath time delays in the deep ocean

Duan¹,

Yang²,

Ma³

et al. 2014

The Journal of the Acoustical Society of America

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Localizing a source of radial movement at moderate range using a single hydrophone can be achieved in the reliable acoustic path by tracking the time delays between the direct and surface-reflected arrivals (D-SR time delays). The problem is defined as a joint estimation of the depth, initial range, and speed of the source, which are the state parameters for the extended Kalman filter (EKF). The D-SR time delays extracted from the autocorrelation functions are the measurements for the EKF. Experimental results using pseudorandom signals show that accurate localization results are achieved by offline iteration of the EKF.

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Passive geoacoustic inversion with a single hydrophone using broadband ship noise

Cited by 43 publications

References 41 publications

Orienting and locating ocean-bottom seismometers from ship noise analysis

Orienting and locating ocean-bottom seismometers from ship noise analysis

Broadband synthetic aperture geoacoustic inversion

Moving source localization with a single hydrophone using multipath time delays in the deep ocean

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