@proceedings {6747, title = {The e-Learning Python for Ocean Mapping project - Empowering the Next Generation of Ocean Mappers with Effective Programming Skills}, year = {2020}, month = {February 24-27}, address = {Quebec City, Quebec, Canada}, abstract = {

The next generation of ocean mappers will need to master programming skills to face the increasingly higher expectations for timely ping-to-public data workflows. As such, the e-learning Python for Ocean Mapping (ePOM) project was established to support new ocean mapping students and professionals in reaching a minimum level of programming skills. These skills are then expanded with further powerful capabilities by leveraging the open-source Python scientific stack and the NOAA Office of Coast Survey\&$\#$39;s Pydro distribution.

}, keywords = {e-learning, juyter notebooks, programming skills, python}, doi = {https://dx.doi.org/10.13140/RG.2.2.33921.40806}, url = {https://www.conferium.com/OLM/Prg_Present.lasso?showevent=202}, author = {Giuseppe Masetti and Semme J Dijkstra and Rochelle Wigley and Greenaway, Samuel F and Damian Manda and Andrew A. Armstrong and Larry A Mayer} } @article {5566, title = {Use of high resolution bathymetry and backscatter for mapping depositional environments on the New Hampshire continental shelf}, year = {2015}, month = {Mar. 23-25, 2015}, address = {Bretton Woods, NH}, keywords = {backscatter, bathymetry, continental shelf, mapping depositional environments}, author = {Larry G Ward and Zachary S. McAvoy and Paul Johnson and Greenaway, Samuel F} } @article {5500, title = {R/V Sikuliaq EM302 \& EM710 Multibeam Echosounder System Shipboard Acceptance Tests - SKQ201400L3}, year = {2014}, month = {August 2014}, pages = {172}, chapter = {Center for Coastal and Ocean Mapping/Joint Hydrographic Center}, author = {Paul Johnson and Flinders, Ashton F and Greenaway, Samuel F} } @proceedings {5163, title = {Oceanographic Weather Maps: Using Oceanographic Models to Improve Seabed Mapping Planning and Acquisition}, year = {2013}, month = {March 25 - 28}, publisher = {THSOA}, address = {New Orleans, LA, USA}, abstract = {

In a world of high precision sensors, one of the few remaining challenges in multibeam echosounding is that of refraction based uncertainty. A poor understanding of oceanographic variability can lead to inadequate sampling of the water mass and the uncertainties that result from this can dominate the uncertainty budget of even state-of-the-art echosounding systems. Though dramatic improvements have been made in sensor accuracies over the past few decades, survey accuracy and efficiency is still potentially limited by a poor understanding of the \“underwater weather.\”

Advances in the sophistication of numerical oceanographic forecast modeling, combined with ever increasing computing power, allow for the timely operation and dissemination of oceanographic nowcast and forecast model systems on regional and global scales. These sources of information, when examined using sound speed uncertainty analysis techniques, have the potential to change the way hydrographers work by increasing our understanding of what to expect from the ocean and when to expect it. Sound speed analyses derived from ocean modeling system\’s three-dimensional predictions could provide guidance for hydrographers during survey planning, acquisition and post-processing of hydrographic data. In this work, we examine techniques for processing and visualizing of predictions from global and regional operational oceanographic forecast models and climatological analyses from an ocean atlas to better understand how these data could best be put to use to in the field of hydrography.

}, author = {Beaudoin, Jonathan}, editor = {John G Kelley and Greenlaw, Jason and Beduhn, Tami and Greenaway, Samuel F} } @proceedings {5177, title = {A Single Vessel Approach to Inter--Vessel Normalization of Seafloor Backscatter Data}, year = {2013}, month = {March 25 - March}, url = {http://www.hypack.com/ushydro/2013/default.aspx}, author = {Greenaway, Samuel F}, editor = {Glen A Rice} } @article {5033, title = {Acoustic observations of oil and gas in the northern Gulf of Mexico during and after the Deepwater Horizon spill}, year = {2012}, month = {28 March}, author = {Thomas C Weber and Larry A Mayer and De Robertis, Alex and Greenaway, Samuel F and Glen A Rice and Beaudoin, Jonathan and Shedd, B.} } @proceedings {5079, title = {Methods for Collecting and Using Backscatter Field Calibration Information for the Reson 7000 Series Multibeam}, year = {2012}, month = {May 15 - May 17}, address = {Niagara Falls, Canada}, keywords = {backscatter, Reson}, author = {Glen A Rice and Greenaway, Samuel F and Thomas C Weber and Beaudoin, Jonathan} } @article {4264, title = {Estimating oil concentration and flow rate with calibrated vessel-mounted acoustic echo sounders}, volume = {108}, year = {2011}, month = {12/2011}, abstract = {

As part of a larger program aimed at evaluating acoustic techniques for mapping the distribution of subsurface oil and gas associated with the Deepwater Horizon-Macondo oil spill, observations were made on June 24 and 25, 2010 using vessel-mounted calibrated single-beam echo sounders on the National Oceanic and Atmospheric Administration ship Thomas Jefferson. Coincident with visual observations of oil at the sea surface, the 200-kHz echo sounder showed anomalously high-volume scattering strength in the upper 200\ m on the western side of the wellhead, more than 100 times higher than the surrounding waters at 1,800-m distance from the wellhead, and weakening with increasing distance out to 5,000\ m. Similar high-volume scattering anomalies were not observed at 12 or 38\ kHz, although observations of anomalously low-volume scattering strength were made in the deep scattering layer at these frequencies at approximately the same locations. Together with observations of ocean currents, the acoustic observations are consistent with a rising plume of small (\<\ 1-mm radius) oil droplets. Using simplistic but reasonable assumptions about the properties of the oil droplets, an estimate of the flow rate was made that is remarkably consistent with those made at the wellhead by other means. The uncertainty in this acoustically derived estimate is high due to lack of knowledge of the size distribution and rise speed of the oil droplets. If properly constrained, these types of acoustic measurements can be used to rapidly estimate the flow rate of oil reaching the surface over large temporal and spatial scales.

}, keywords = {Acoustic Echo Sounders, Deepwater Horizon, Oil Concentration, Vessel-Mounted Acoustic Echo Sounders}, url = {http://www.pnas.org/content/early/2011/12/07/1108771108.full.pdf+html}, author = {Thomas C Weber and De Robertis, Alex and Greenaway, Samuel F and Smith, Shep M and Larry A Mayer and Glen A Rice} } @article {, title = {Observations Near the Well Head using Vessel Mounted Scientific Echo Sounders}, year = {2010}, month = {Nov 15 - Nov 19}, chapter = {160th Meeting}, address = {Cancun, Quintana Roo, Mexico}, keywords = {Other}, author = {Thomas C Weber and Larry A Mayer and Greenaway, Samuel F and De Robertis, Alex and Christopher D Wilson and Smith, Shep M and Glen A Rice} } @proceedings {, title = {Test Methodology for Evaluation of Linearity of Multibeam Echosounder Backscatter Performance}, year = {2010}, month = {Sep 20 - Sep 23}, chapter = {2010}, address = {Seattle, WA, USA}, keywords = {Sonar Calibration}, author = {Greenaway, Samuel F and Thomas C Weber} } @mastersthesis {7295, title = {Linearity Tests of a Multibeam Echosounder}, volume = {Ocean Engineering}, year = {2010}, month = {December}, pages = {80}, school = {University of New Hampshire}, address = {Durham, NH}, abstract = {

The backscatter information available from many modern multibeam echosounder systems (MBES) has been shown to be useful for a number of purposes such as habitat classification and bottom type classification. Linearity of the system response is posited to be an important requirement for many backscatter processing techniques. A procedure to measure the system linearity is developed for the Reson 7125. These measurements are performed both in a controlled test tank environment and with systems installed on operational platforms. The linearity of the system with respect to power, gain, and the returned signal level is evaluated. It is possible to drive the Reson 7125 to nonlinear behavior. The consequences of nonlinearity on both bathymetric measurements and backscatter intensity values are developed theoretically and tested against experimental observations. Nonlinear performance generally complicates and degrades both backscatter and bathymetric data products.

}, url = {https://scholars.unh.edu/thesis/596}, author = {Greenaway, Samuel F} }