The objective of this paper is to demonstrate active acoustic multibeam sensors usability as an o... more The objective of this paper is to demonstrate active acoustic multibeam sensors usability as an oil detection survey tool under ice. This is a crucial element of all drilling, exploration taking place when there is partial or full ice cover. This paper will discuss some of the preliminary findings done during an experiment conducted as part of the IOGP funded contract. The paper will discuss the active acoustic detection of oil in the water/oil ice interface, practical results from tests under ice in tank environment will be presented in various stages of ice growth as well as melting phase, practical deployment of large area active acoustic survey tools under ice will be discussed briefly with examples. Practical results from oil releases under ice during growth and the melting process in US Navy cold water lab CRREL New Hampshire, US. Example of deployment of sensors under ice in USCG trials in Lake Michigan, US. Recommendation for survey tool as well as large survey area coverage...
Abstract-This paper presents the technological imple-mentation of method for calibration and back... more Abstract-This paper presents the technological imple-mentation of method for calibration and backscattering strength estimation for sonar systems. In this method, the electrical and acoustic quantities of the sonar are meas-ured separately rather than using the standards target ...
International Oil Spill Conference Proceedings, 2017
2017-042:A combined telescopic fluorescence instrument and a wide band multibeam sonar (WBMS) wer... more 2017-042:A combined telescopic fluorescence instrument and a wide band multibeam sonar (WBMS) were developed as dual sensors for detecting underwater oil leaks and plumes. The fluorescence instrument is a forward-looking fluorescence polarization instrument with motorized telescopic focusing that can detect oil at a standoff distance. The instrument responds only to materials showing fluorescence polarization, and therefore is able to distinguish oil from other fluorescing species in water. The WBMS is as an acoustic sensor that provides 2D as well as 3D topology for mapping and water column imagery. The operational integration of the two sensors result in a more definitive identification and mapping of oil in the water column co-registered in time and space. The sonar records a 3-dimensional map of a leak, and then the fluorescence sensor is use to confirm that the leak that the sonar detected is oil. A sensing scheme to integrate the operation and overlap the field of view of the ...
− The paper describes the main drawbacks in the application of conventional acoustics in shallow ... more − The paper describes the main drawbacks in the application of conventional acoustics in shallow waters, and reviews the advantages and limitations that existing multibeam sonar present in these ecosystems. New techniques and methods for adapting multibeam sonar ...
Journal of The Acoustical Society of America, 2000
Broadband echo spectra from euphausiids and copepods. [The Journal of the Acoustical Society of A... more Broadband echo spectra from euphausiids and copepods. [The Journal of the Acoustical Society of America 108, 2469 (2000)]. Kenneth G. Foote, Tor Knutsen, Philip R. Atkins, Claire Bongiovanni, David TI Francis, Peter K. Eriksen, Mette Torp Larsen, Tom Mortensen. Abstract. ...
Journal of The Acoustical Society of America, 1999
A seven‐octave‐bandwidth echo sounding system for application to fish and zooplankton. [The Journ... more A seven‐octave‐bandwidth echo sounding system for application to fish and zooplankton. [The Journal of the Acoustical Society of America 105, 994 (1999)]. Kenneth G. Foote, Tor Knutsen, Philip R. Atkins, Claire Bongiovanni, David TI Francis, Peter K. Eriksen, Tom Mortensen. ...
The objective of this paper is to demonstrate active acoustic multibeam sensors usability as an o... more The objective of this paper is to demonstrate active acoustic multibeam sensors usability as an oil detection survey tool under ice. This is a crucial element of all drilling, exploration taking place when there is partial or full ice cover. This paper will discuss some of the preliminary findings done during an experiment conducted as part of the IOGP funded contract. The paper will discuss the active acoustic detection of oil in the water/oil ice interface, practical results from tests under ice in tank environment will be presented in various stages of ice growth as well as melting phase, practical deployment of large area active acoustic survey tools under ice will be discussed briefly with examples. Practical results from oil releases under ice during growth and the melting process in US Navy cold water lab CRREL New Hampshire, US. Example of deployment of sensors under ice in USCG trials in Lake Michigan, US. Recommendation for survey tool as well as large survey area coverage...
Abstract-This paper presents the technological imple-mentation of method for calibration and back... more Abstract-This paper presents the technological imple-mentation of method for calibration and backscattering strength estimation for sonar systems. In this method, the electrical and acoustic quantities of the sonar are meas-ured separately rather than using the standards target ...
International Oil Spill Conference Proceedings, 2017
2017-042:A combined telescopic fluorescence instrument and a wide band multibeam sonar (WBMS) wer... more 2017-042:A combined telescopic fluorescence instrument and a wide band multibeam sonar (WBMS) were developed as dual sensors for detecting underwater oil leaks and plumes. The fluorescence instrument is a forward-looking fluorescence polarization instrument with motorized telescopic focusing that can detect oil at a standoff distance. The instrument responds only to materials showing fluorescence polarization, and therefore is able to distinguish oil from other fluorescing species in water. The WBMS is as an acoustic sensor that provides 2D as well as 3D topology for mapping and water column imagery. The operational integration of the two sensors result in a more definitive identification and mapping of oil in the water column co-registered in time and space. The sonar records a 3-dimensional map of a leak, and then the fluorescence sensor is use to confirm that the leak that the sonar detected is oil. A sensing scheme to integrate the operation and overlap the field of view of the ...
− The paper describes the main drawbacks in the application of conventional acoustics in shallow ... more − The paper describes the main drawbacks in the application of conventional acoustics in shallow waters, and reviews the advantages and limitations that existing multibeam sonar present in these ecosystems. New techniques and methods for adapting multibeam sonar ...
Journal of The Acoustical Society of America, 2000
Broadband echo spectra from euphausiids and copepods. [The Journal of the Acoustical Society of A... more Broadband echo spectra from euphausiids and copepods. [The Journal of the Acoustical Society of America 108, 2469 (2000)]. Kenneth G. Foote, Tor Knutsen, Philip R. Atkins, Claire Bongiovanni, David TI Francis, Peter K. Eriksen, Mette Torp Larsen, Tom Mortensen. Abstract. ...
Journal of The Acoustical Society of America, 1999
A seven‐octave‐bandwidth echo sounding system for application to fish and zooplankton. [The Journ... more A seven‐octave‐bandwidth echo sounding system for application to fish and zooplankton. [The Journal of the Acoustical Society of America 105, 994 (1999)]. Kenneth G. Foote, Tor Knutsen, Philip R. Atkins, Claire Bongiovanni, David TI Francis, Peter K. Eriksen, Tom Mortensen. ...
Uploads
Papers