A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A satellite altimetry data assimilation approach to optimise sea state estimates from vessel motion
https://orcid.org/0000-0003-4206-8516
https://orcid.org/0000-0001-7989-2192
https://orcid.org/0000-0001-7957-4012
https://orcid.org/0000-0003-3112-6856
Abstract Estimates of directional wave spectra and related parameters can be obtained from ship motion data through the wave-buoy analogy approach. The fundamental input is the response amplitude operator (RAO), which translates ship response into a wave energy spectrum. While ship motion is routinely measured on ocean going vessels, the RAO is not directly available and it is approximated using ship hydrodynamic models. The lack of publicly available details of hull geometry and loading conditions can results in significant inaccuracy of this operator. Considering the reliability of remotely sensed wave height, here we propose an assimilation technique that uses satellite altimeter observations to calibrate the RAO and minimise its uncertainties. The method is applied to estimate sea state conditions during the Antarctic Circumnavigation Expedition by converting motion response of the icebreaker Akademik Tryoshnikov as recorded by the on-board inertial measurement unit. Comparison against concurrent sea state observations obtained from a marine radar device shows a good agreement for a variety of parameters including significant wave height, wave periods and mean wave direction.
Highlights Sea state properties and wave spectrum, are estimated from ship motion response. Satellite observations are used in the estimation of the response amplitude operator. Estimated sea state conditions from ship motion match well radar measurements.
A satellite altimetry data assimilation approach to optimise sea state estimates from vessel motion
https://orcid.org/0000-0003-4206-8516
https://orcid.org/0000-0001-7989-2192
https://orcid.org/0000-0001-7957-4012
https://orcid.org/0000-0003-3112-6856
Abstract Estimates of directional wave spectra and related parameters can be obtained from ship motion data through the wave-buoy analogy approach. The fundamental input is the response amplitude operator (RAO), which translates ship response into a wave energy spectrum. While ship motion is routinely measured on ocean going vessels, the RAO is not directly available and it is approximated using ship hydrodynamic models. The lack of publicly available details of hull geometry and loading conditions can results in significant inaccuracy of this operator. Considering the reliability of remotely sensed wave height, here we propose an assimilation technique that uses satellite altimeter observations to calibrate the RAO and minimise its uncertainties. The method is applied to estimate sea state conditions during the Antarctic Circumnavigation Expedition by converting motion response of the icebreaker Akademik Tryoshnikov as recorded by the on-board inertial measurement unit. Comparison against concurrent sea state observations obtained from a marine radar device shows a good agreement for a variety of parameters including significant wave height, wave periods and mean wave direction.
Highlights Sea state properties and wave spectrum, are estimated from ship motion response. Satellite observations are used in the estimation of the response amplitude operator. Estimated sea state conditions from ship motion match well radar measurements.
A satellite altimetry data assimilation approach to optimise sea state estimates from vessel motion
https://orcid.org/0000-0003-4206-8516
https://orcid.org/0000-0001-7989-2192
https://orcid.org/0000-0001-7957-4012
https://orcid.org/0000-0003-3112-6856
Abstract Estimates of directional wave spectra and related parameters can be obtained from ship motion data through the wave-buoy analogy approach. The fundamental input is the response amplitude operator (RAO), which translates ship response into a wave energy spectrum. While ship motion is routinely measured on ocean going vessels, the RAO is not directly available and it is approximated using ship hydrodynamic models. The lack of publicly available details of hull geometry and loading conditions can results in significant inaccuracy of this operator. Considering the reliability of remotely sensed wave height, here we propose an assimilation technique that uses satellite altimeter observations to calibrate the RAO and minimise its uncertainties. The method is applied to estimate sea state conditions during the Antarctic Circumnavigation Expedition by converting motion response of the icebreaker Akademik Tryoshnikov as recorded by the on-board inertial measurement unit. Comparison against concurrent sea state observations obtained from a marine radar device shows a good agreement for a variety of parameters including significant wave height, wave periods and mean wave direction.
Highlights Sea state properties and wave spectrum, are estimated from ship motion response. Satellite observations are used in the estimation of the response amplitude operator. Estimated sea state conditions from ship motion match well radar measurements.
A satellite altimetry data assimilation approach to optimise sea state estimates from vessel motion
Nelli, Filippo (author) / Derkani, Marzieh H. (author) / Alberello, Alberto (author) / Toffoli, Alessandro (author)
Applied Ocean Research ; 132
2023-01-19
Article (Journal)
Electronic Resource
English
ASSIMILATION OF SATELLITE ALTIMETRY DATA INTO OCEAN CIRCULATION MODEL
| British Library Conference Proceedings | 2007
Coastal Currents From Satellite Altimetry
| British Library Online Contents | 1997
Current state of art of satellite altimetry
| Online Contents | 2017
Long-term vertical land motion from double-differenced tide gauge and satellite altimetry data
| Online Contents | 2013