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Australia ChapterReported by Mal Heron One innovation at ISIE was the Interactive Session where poster presenters were each given a 3-minute time slot to summarize their poster during an extended coffee break. It was very informal and some people did not listen; but many did. It was held in the foyer where the coffee was served with people coming and going. I thought it was an excellent feature without imposing on the schedule. Afterwards I went back to look more carefully at a couple of the posters. Victoria Chapter Technical MeetingReported by Nick Hall-Patch The earth’s magnetic field varies somewhat with time, and these variations affect the accuracy of modern navigation systems. Dr. Rasson described the network of magnetic observatories. maintained by various countries, as having an objective of establishing a “magnetic atlas” that records variations in the geomagnetic field. These observatories are land-based internationally, and must be accessible due to frequent recalibration. There are no true magnetic observatories located under the ocean at this time, so a comprehensive picture of the magnetic field over the Earth is not currently observable. Dr. Rasson then described the set of instruments used in land based magnetic observatories, which includes a variometer to measure changes occurring along the three axes of the magnetic field, and a proton magnetometer, providing the modulus of the magnetic field. Additionally, there is a non-magnetic theodolite which provides the bearing of the field relative to true north, as well as its inclination with respect to the vertical.
Although he pointed out that there are presently magnetic observatories on small islands around the world, in addition to those on the continents, Dr. Rasson presented a rationale for placing additional observatories on the ocean floor. Scientific research would benefit from the resultant quantity and quality of magnetic field data, particularly at high latitudes where geomagnetic field variations are more intense. Improved magnetic field modeling could lead to greater understanding of the physics of the deep Earth, as well as of such phenomena as the south Atlantic anomaly, in an area of the world where the strength of the magnetic field is considerably lower than elsewhere. Dr. Rasson also discussed how tsunamis and underwater earthquakes create perturbations in the Earth’s magnetic field. These pertubations could be identified by ocean-based observatories and provide earlier warnings to the public about these events. Finally, greater accuracy in geomagnetic field observations provided by ocean floor-based observatories could benefit industry, by integrating acquired data into the products employing magnetic declination for compass correction. Dr. Rasson pointed out, as an example, that more accurate local geomagnetic field information could ensure more precise positioning for drilling undersea oil wells.
There are some notable obstacles associated with deploying present magnetic observatory sensors under the ocean. In addition to the standard concerns associated with placing instrumentation on the sea floor, such as power, communications, corrosion, extreme water pressure, et al, there are other issues for the observatories. These include the need to be in a non-magnetic environment, to have an autonomous ability to derive the direction of true north, and to perform self-leveling. Unlike surface observatories, all orientation of the instrumentation needs to be automated. Dr. Rasson continued by describing some technical solutions to the problems associated with creating underwater magnetic observatories. The use of a fluxgate variometer provides low-noise measurements of the magnetic field vector changes with a high sampling rate. Together with a proton magnetometer, this provides the absolute measurement of the field’s modulus. A non-magnetic theodolite, equipped with a fluxgate and a fiber optic gyro, provide an indication of true and magnetic North as well as magnetic inclination. The levelling of the system is accomplished with software rather than by using motorized leveling screws. The use of commercial products in the design of the underwater observatory required some modifications in order to meet desired specifications. The total resulting package was low powered enough to be suitable for battery operation, and could communicate via an acoustic modem. A question and answer time followed the presentation. Among the issues discussed were the impact of ocean currents and underwater electrical cables on the observed magnetic fields. |


Dr. James V. Candy is the Chief Scientist for Engineering and former Director of the Center for Advanced Signal & Image Sciences at the University of California, Lawrence Livermore National Laboratory. Dr. Candy received a commission in the USAF in 1967 and was a Systems Engineer/Test Director from 1967 to 1971. He has been a Researcher at the Lawrence Livermore National Laboratory since 1976 holding various positions including that of Project Engineer for Signal Processing and Thrust Area Leader for Signal and Control Engineering. Educationally, he received his B.S.E.E. degree from the University of Cincinnati and his M.S.E. and Ph.D. degrees in Electrical Engineering from the University of Florida, Gainesville. He is a registered Control System Engineer in the state of California. He has been an Adjunct Professor at San Francisco State University, University of Santa Clara, and UC Berkeley, Extension teaching graduate courses in signal and image processing. He is an Adjunct Full-Professor at the University of California, Santa Barbara. Dr. Candy is a Fellow of the IEEE and a Fellow of the Acoustical Society of America (ASA) and elected as a Life Member (Fellow) at the University of Cambridge (Clare Hall College). He is a member of Eta Kappa Nu and Phi Kappa Phi honorary societies. He was elected as a Distinguished Alumnus by the University of Cincinnati. Dr. Candy received the IEEE Distinguished Technical Achievement Award for the “development of model-based signal processing in ocean acoustics.” Dr. Candy was selected as a IEEE Distinguished Lecturer for oceanic signal processing as well as presenting an IEEE tutorial on advanced signal processing available through their video website courses. He was nominated for the prestigious Edward Teller Fellowship at Lawrence Livermore National Laboratory. Dr. Candy was awarded the Interdisciplinary Helmholtz-Rayleigh Silver Medal in Signal Processing/Underwater Acoustics by the Acoustical Society of America for his technical contributions. He has published over 225 journal articles, book chapters, and technical reports as well as written three texts in signal processing, “Signal Processing: the Model-Based Approach,” (McGraw-Hill, 1986), “Signal Processing: the Modern Approach,” (McGraw-Hill, 1988), “Model-Based Signal Processing,” (Wiley/IEEE Press, 2006) and “Bayesian Signal Processing: Classical, Modern and Particle Filtering” (Wiley/IEEE Press, 2009). He was the General Chairman of the inaugural 2006 IEEE Nonlinear Statistical Signal Processing Workshop held at the Corpus Christi College, University of Cambridge. He has presented a variety of short courses and tutorials sponsored by the IEEE and ASA in Applied Signal Processing, Spectral Estimation, Advanced Digital Signal Processing, Applied Model-Based Signal Processing, Applied Acoustical Signal Processing, Model-Based Ocean Acoustic Signal Processing and Bayesian Signal Processing for IEEE Oceanic Engineering Society/ASA. He has also presented short courses in Applied Model-Based Signal Processing for the SPIE Optical Society. He is currently the IEEE Chair of the Technical Committee on “Sonar Signal and Image Processing” and was the Chair of the ASA Technical Committee on “Signal Processing in Acoustics” as well as being an Associate Editor for Signal Processing of ASA (on-line JASAXL). He was recently nominated for the Vice Presidency of the ASA and elected as a member of the Administrative Committee of IEEE OES. His research interests include Bayesian estimation, identification, spatial estimation, signal and image processing, array signal processing, nonlinear signal processing, tomography, sonar/radar processing and biomedical applications.
Kenneth Foote is a Senior Scientist at the Woods Hole Oceanographic Institution. He received a B.S. in Electrical Engineering from The George Washington University in 1968, and a Ph.D. in Physics from Brown University in 1973. He was an engineer at Raytheon Company, 1968-1974; postdoctoral scholar at Loughborough University of Technology, 1974-1975; research fellow and substitute lecturer at the University of Bergen, 1975-1981. He began working at the Institute of Marine Research, Bergen, in 1979; joined the Woods Hole Oceanographic Institution in 1999. His general area of expertise is in underwater sound scattering, with applications to the quantification of fish, other aquatic organisms, and physical scatterers in the water column and on the seafloor. In developing and transitioning acoustic methods and instruments to operations at sea, he has worked from 77°N to 55°S.
René Garello, professor at Télécom Bretagne, Fellow IEEE, co-leader of the TOMS (Traitements, Observations et Méthodes Statistiques) research team, in Pôle CID of the UMR CNRS 3192 Lab-STICC.
Professor Mal Heron is Adjunct Professor in the Marine Geophysical Laboratory at James Cook University in Townsville, Australia, and is CEO of Portmap Remote Ocean Sensing Pty Ltd. His PhD work in Auckland, New Zealand, was on radio-wave probing of the ionosphere, and that is reflected in his early ionospheric papers. He changed research fields to the scattering of HF radio waves from the ocean surface during the 1980s. Through the 1990s his research has broadened into oceanographic phenomena which can be studied by remote sensing, including HF radar and salinity mapping from airborne microwave radiometers . Throughout, there have been one-off papers where he has been involved in solving a problem in a cognate area like medical physics, and paleobiogeography. Occasionally, he has diverted into side-tracks like a burst of papers on the effect of bushfires on radio communications. His present project of the Australian Coastal Ocean Radar Network (ACORN) is about the development of new processing methods and applications of HF radar data to address oceanography problems. He is currently promoting the use of high resolution VHF ocean radars, based on the PortMap high resolution radar.
Hanu Singh graduated B.S. ECE and Computer Science (1989) from George Mason University and Ph.D. (1995) from MIT/Woods Hole.He led the development and commercialization of the Seabed AUV, nine of which are in operation at other universities and government laboratories around the world. He was technical lead for development and operations for Polar AUVs (Jaguar and Puma) and towed vehicles(Camper and Seasled), and the development and commercialization of the Jetyak ASVs, 18 of which are currently in use. He was involved in the development of UAS for polar and oceanographic applications, and high resolution multi-sensor acoustic and optical mapping with underwater vehicles on over 55 oceanographic cruises in support of physical oceanography, marine archaeology, biology, fisheries, coral reef studies, geology and geophysics and sea-ice studies. He is an accomplished Research Student advisor and has made strong collaborations across the US (including at MIT, SIO, Stanford, Columbia LDEO) and internationally including in the UK, Australia, Canada, Korea, Taiwan, China, Japan, India, Sweden and Norway. Hanu Singh is currently Chair of the IEEE Ocean Engineering Technology Committee on Autonomous Marine Systems with responsibilities that include organizing the biennial IEEE AUV Conference, 2008 onwards. Associate Editor, IEEE Journal of Oceanic Engineering, 2007-2011. Associate editor, Journal of Field Robotics 2012 onwards.
Milica Stojanovic graduated from the University of Belgrade, Serbia, in 1988, and received the M.S. and Ph.D. degrees in electrical engineering from Northeastern University in Boston, in 1991 and 1993. She was a Principal Scientist at the Massachusetts Institute of Technology, and in 2008 joined Northeastern University, where she is currently a Professor of electrical and computer engineering. She is also a Guest Investigator at the Woods Hole Oceanographic Institution. Milica’s research interests include digital communications theory, statistical signal processing and wireless networks, and their applications to underwater acoustic systems. She has made pioneering contributions to underwater acoustic communications, and her work has been widely cited. She is a Fellow of the IEEE, and serves as an Associate Editor for its Journal of Oceanic Engineering (and in the past for Transactions on Signal Processing and Transactions on Vehicular Technology). She also serves on the Advisory Board of the IEEE Communication Letters, and chairs the IEEE Ocean Engineering Society’s Technical Committee for Underwater Communication, Navigation and Positioning. Milica is the recipient of the 2015 IEEE/OES Distinguished Technical Achievement Award.
Dr. Paul C. Hines was born and raised in Glace Bay, Cape Breton. From 1977-1981 he attended Dalhousie University, Halifax, Nova Scotia, graduating with a B.Sc. (Hon) in Engineering-Physics.