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Description
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These data included broadband echosounder data measured as part of the ONR Under Sea Remote Sensing (USRS) project. These observations data acquired around the ebb plume from of the Connecticut River using a downward-looking pole mounted system and a Remus 100 vehicle. The downward-looking, pole samples were recorded during transects with R/V Dawn Treader, which was equipped with Simrad ES70-7C and ES120-7C split beam transducers. The Remus 100 vehicle was equipped with upward-looking echosounders (Simrad model ES200-7CDK split beam and ES333-7CDK single beam) operated in an upward looking configuration from a REMUS 100. All measurements are associated with transects of the ebb plume front and are dominated by scattering from bubbles entrained in the vicinity of the front and scattering from turbulent mixing and stratification at the base of the river plume.
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Notes
| During sampling the Remus 100 and R/V Dawn Treader crossed the ebb plume front. Throughout the sampling the echosounders pinged continuously to acquire high-resolution measurements of acoustics scattering throughout the water column. The raw data was processed to created calibration echograms containing volume backscattering coefficients [dB re 1/m]. Supporting variables include depth (or range) vectors, distance along the transect, geographic coordinates, and timestamps such that the observations can be aligned with other measurements from the campaign. The instruments were calibrated following standard sphere calibration techniques. |
