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A comparison of sea-state parameters from nautical radar images and buoy data |
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| Authors: | P Izquierdo C Guedes Soares J C Nieto Borge G R Rodríguez |
| Institution: | a Unit of Marine Technology and Engineering, Technical University of Lisbon, Instituto Superior Técnico, 1049-001, Lisbon, Portugal;b German Aerospace Center (DLR), D-82234, Wessling, Germany;c Department of Physics, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017, Las Palmas de Gran Canaria, Spain |
| Abstract: | Nautical radar and scalar buoy measurements of ocean wind generated waves have been analysed to compare the spectral parameters estimated from both sensors. The time series of different sea-state parameters and the differences and ratios of the values obtained from radar and buoy data using different analysis methods are compared. It has been observed that main differences between the sea-state parameters derived by using measurements obtained from both sensors result both from device characteristics and from the method of spectral estimation. In particular, it is shown that the Nyquist frequency has an important effect on the value of the sea-state parameters depending on spectral moments of order higher than zero. |
| Keywords: | Sea-state parameters Ocean waves Nautical radar and scalar buoy |
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