Use of nautical radar as a wave monitoring instrument

Borge, José Carlos Nieto; Reichert, Konstanze; Dittmer, J.

doi:10.1016/s0378-3839(99)00032-0

Cited by 137 publications

(33 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Marine radars have been used for the remote determination of offshore 2-D wave spectra on both a research and commercial basis for some years now (Borge et al 1999). Their use in coastal waters has been complicated by the non-uniform behaviour of waves over varying bathymetry in shallow water.…”

Section: Introductionmentioning

confidence: 99%

Determination of Bathymetry Using Marine Radar Images of Waves

Bell¹

2002

Ocean Wave Measurement and Analysis (2001)

View full text Add to dashboard Cite

This paper illustrates a method of calculating bathymetric maps of shallow water areas (<20m depth) using an analysis of wave properties determined from an analysis of marine radar image sequences of waves. Water depths determined using this corrected for tidal variation in water level are compared quantitatively to conventional surveys. Two case studies are shown from the COAST3D project field sites at Egmond aan Zee in the Netherlands and at Teignmouth in the United Kingdom.

show abstract

Section: Introductionmentioning

confidence: 99%

Determination of Bathymetry Using Marine Radar Images of Waves

Bell¹

2002

Ocean Wave Measurement and Analysis (2001)

View full text Add to dashboard Cite

show abstract

“…The SNR was used to estimate the sea spectrum such that H s was calculated as four times the square root of the estimated spectrum area [Plant and Zurk, 1997]. For X-band radar images, the 3DFFT method was used in Borge et al [1999] to calculate the SNR as…”

Section: Radar For Open Ocean Applicationmentioning

confidence: 99%

“…Young et al [1985] used spectral analysis to detect currents, and Ziemer and Rosenthal [1987] proposed the use of a modulation transfer function to derive surface elevation from radar images of the sea surface. Borge et al [1999] used the signal-to-noise (SNR) ratio in radar images to propose an approximate relation for the significant wave height with two parameters that have to be calibrated. The question how to reveal the exact relation between radar images and wave elevation/significant wave height has been subject to many more publications, see e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The SNR was used to estimate the sea spectrum such that H s was calculate as four times the square root of the estimated spectrum area [Plant and Zurk, 1997]. For X-band radar, a 3DFFT method [Young et al, 1985] was used to calculate the SNR as described in Borge et al [1999]. In contrast to Plant and Zurk [1997], H s was taken to be linearly related to the square root of the SNR with two free parameters which were calibrated from in-situ measurements.…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of the proposed method is that the external calibration (as in e.g. Borge et al [1999] and Buckley and Aler [1998b]) is not required. The basic idea is as follows.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reconstruction and deterministic prediction of ocean waves from synthetic radar images

Wijaya¹

View full text Add to dashboard Cite

Microwave backscattering from surf zone waves

Catalán

Haller

Plant

2014

J. Geophys. Res. Oceans

View full text Add to dashboard Cite

The microwave backscatter properties of surf zone waves are analyzed using field observations. By utilizing a preexisting, independent, water surface discrimination technique, the microwave returns were extracted along individual waveforms and the data from shoaling (steepening) waves, surf zone breaking waves, and remnant foam were separated and quantified. In addition, a wave tracking analysis technique allows the returns to be examined on a wave-by-wave basis as individual waves progress through the shoaling zone and break on a nearshore sand bar. Normalized radar cross sections (NRCS), polarization ratios, Doppler spectra, and scatterer velocities were collected using a dual-polarized, X-band radar operating at lower grazing angles than previously reported (1 -3.5 ). The results indicate that the maximum NRCS levels are from the active breaking portions of the wave and were consistently about 220 dB, regardless of radar polarization, azimuth angle, wave height, or wind speed. In addition, breaking waves induce broadening of the Doppler spectra and mean scatterer velocities that correlate well with the carrier wave celerity. Analysis of the polarization ratios suggest that the active breaking portions of the wave are depolarized but that higher polarization ratios (>0 dB) are found on the leading edges shoreward of the active breaking portions of the waves, which indicates a clear distinction between two scattering regimes. These results are consistent with scattering from a very rough surface that is being mechanically generated by the breaking process, showing a good agreement with the expected grazing angle dependency of a Lambertian scatterer.

show abstract

Use of nautical radar as a wave monitoring instrument

Cited by 137 publications

References 7 publications

Determination of Bathymetry Using Marine Radar Images of Waves

Determination of Bathymetry Using Marine Radar Images of Waves

Reconstruction and deterministic prediction of ocean waves from synthetic radar images

Microwave backscattering from surf zone waves

Contact Info

Product

Resources

About