Demonstration testd of LBVDS instrumented tow cable in waters south of New England-initial results

Ruffa, Anthony A.; Bard, Jochen; Sundvik, Michael T.

doi:10.1109/oceans.2000.881239

Cited by 1 publication

(1 citation statement)

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“…The upper part during the experiment was dominated by surface warming, the mixed layer, and a thermocline down to the mid-water-column shelf water. 41 The oceanographic measurements during the experiment consisted of XBTs from both the RV Endeavor and NRV Alliance, 27 Seabird CTD casts from the RV Endeavor, and five deployments of the Instrumented Tow Cable, 42 continuous measurement device for temperature along a tow cable. In general, the measurements showed a sound speed profile with a moderately thin surface mixed layer ͑10 m or less͒, a thermocline of moderate gradient, to a temperature and sound speed minimum near 30-to 50-m depth ͑depend-ing on the location͒ containing the ''cold pool'' of shelf water, below which was an increase in salinity and temperature associated with the shelf break front zone of mixing.…”

Section: Appendix: Strataform Oceanographymentioning

confidence: 99%

Long range acoustic imaging of the continental shelf environment: The Acoustic Clutter Reconnaissance Experiment 2001

Ratilal

Lai

Symonds

et al. 2005

The Journal of the Acoustical Society of America

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An active sonar system is used to image wide areas of the continental shelf environment by long-range echo sounding at low frequency. The bistatic system, deployed in the STRATAFORM area south of Long Island in April-May of 2001, imaged a large number of prominent clutter events over ranges spanning tens of kilometers in near real time. Roughly 3000 waveforms were transmitted into the water column. Wide-area acoustic images of the ocean environment were generated in near real time for each transmission. Between roughly 10 to more than 100 discrete and localized scatterers were registered for each image. This amounts to a total of at least 30000 scattering events that could be confused with those from submerged vehicles over the period of the experiment. Bathymetric relief in the STRATAFORM area is extremely benign, with slopes typically less than 0.5 degrees according to high resolution (30 m sampled) bathymetric data. Most of the clutter occurs in regions where the bathymetry is locally level and does not coregister with seafloor features. No statistically significant difference is found in the frequency of occurrence per unit area of repeatable clutter inside versus outside of areas occupied by subsurface river channels.

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Section: Appendix: Strataform Oceanographymentioning

confidence: 99%