Search Results - "Lyzenga, D. R."

COASTWATCH'95: ERS 1/2 SAR detection of natural film on the ocean surface by Espedal, H. A., Johannessen, O. M., Johannessen, J. A., Dano, E., Lyzenga, D. R., Knulst, J. C.

“…Ocean mesoscale phenomena such as eddies and current convergence zones can often be seen in synthetic aperture radar (SAR) images due to characteristic…”
Get full text

Effects of intermediate-scale waves on radar signatures of ocean fronts and internal waves by Lyzenga, David R.

“…A new mechanism is proposed to explain the large changes in radar backscatter observed at high microwave frequencies (X band and C band) near ocean fronts and…”
Get full text

Comparison of airborne synthetic aperture radar imagery with in situ surface-slope measurements across Gulf Stream slicks and a convergent front by Marmorino, G. O., Lyzenga, D. R., Kaiser, J. A. C.

“…Synthetic aperture radar (SAR) imagery showing two types of features near the inshore edge of the Gulf Stream are compared with nearly simultaneous estimates…”
Get full text

A Numerical Study of the Retrieval of Sea Surface Height Profiles From Low Grazing Angle Radar Data by Johnson, J.T., Burkholder, R.J., Toporkov, J.V., Lyzenga, D.R., Plant, W.J.

“…A numerical study of the retrieval of sea surface height profiles from low grazing angle radar observations is described. The study is based on a numerical…”
Get full text

Radar Backscatter and Surface Roughness Measurements for Stationary Breaking Waves by Walker, D. T., Lyzenga, D. R., Ericson, E. A., Lund, D. E.

“…In this study the surface features and the radar backscatter associated with breaking waves generated by a uniform flow past a stationary submerged hydrofoil…”
Get full text

Measurement of surface currents using sequential synthetic aperture radar images of slick patterns near the edge of the Gulf Stream by Lyzenga, David R., Marmorino, George O.

“…Two‐dimensional surface currents are estimated over an area of ∼100 km2 near the inshore edge of the Gulf Stream by correlating the surface slick patterns…”
Get full text

Numerical Simulation of Synthetic Aperture Radar Image Spectra for Ocean Waves by Lyzenga, David R.

“…A numerical model for predicting the synthetic aperture radar (SAR) image of a moving ocean surface is described, and results are presented for two SIR-B data…”
Get full text

Numerical calculations of radar scattering from sharply peaked ocean waves by Lyzenga, D.R., Ericson, E.A.

“…A numerical solution of the surface-current integral equation is used to calculate the radar backscatter for several wavelike surfaces. The surfaces used in…”
Get full text

Comparison of WindSat brightness temperatures with two-scale model predictions by Lyzenga, D.R.

“…Predictions of the polarized microwave brightness temperatures over the ocean are made using a two-scale surface bidirectional reflectance model combined with…”
Get full text

An emissivity-based wind vector retrieval algorithm for the WindSat polarimetric radiometer by Brown, S.T., Ruf, C.S., Lyzenga, D.R.

“…The Naval Research Laboratory WindSat polarimetric radiometer was launched on January 6, 2003 and is the first fully polarimetric radiometer to be flown in…”
Get full text

Characterizing wave coherence with satellite-based synthetic aperture radar by Walker, D.T., Lyzenga, D.R., Renouf, M.

“…A critical issue in the design of large floating structures, such as those being considered in the mobile off-shore base effort currently being pursued by the…”
Get full text

Efficient Model-Based Estimation of Atmospheric Transmittance and Ocean Wind Vectors From WindSat Data by Duk-jin Kim, Lyzenga, D.R.

“…A new method for estimating the atmospheric transmittance and wind speed over the ocean from WindSat data is derived using a simplified model for the ocean…”
Get full text

Azimuth falloff effects in two-antenna SAR measurements of ocean wave spectra by Lyzenga, D.R., Malinas, N.P.

“…Estimates of ocean wave spectra obtained from conventional synthetic aperture radar (SAR) images suffer from the azimuth falloff effect which limits the range…”
Get full text

Comparison of radar and video observations of shallow water breaking waves by Haller, M.C., Lyzenga, D.R.

“…Simultaneous microwave and video measurements of shallow water breaking waves are presented. A comparison of the data from the two sensors shows that…”
Get full text

Unconstrained inversion of waveheight spectra from SAR images by Lyzenga, D.R.

“…A procedure for inverting the nonlinear relationship between the waveheight spectrum and the SAR image spectrum is presented, and this procedure is evaluated…”
Get full text

The Contribution of Wedge Scattering to the Radar Cross Section of the Ocean Surface by Lyzenga, D. R., Maffett, A. L., Shuchman, R. A.

“…This letter considers the contribution to the radar cross section of the ocean surface due to scattering from edges for which the local radius of curvature is…”
Get full text

Estimation of ocean wave spectra using two-antenna SAR systems by Lyzenga, D.R., Bennett, J.R.

“…Data from synthetic aperture radar, (SAR) systems can be used to estimate ocean wave directional spectra, but the method is limited by nonlinearities…”
Get full text

Radar backscatter from stationary breaking waves by Ericson, Eric A., Lyzenga, David R., Walker, David T.

“…Radar backscatter measurements from stationary breaking waves were used to examine how the surface roughness generated by wave breaking affects radar…”
Get full text

A Comparison of SIR-B Directional Ocean Wave Spectra with Aircraft Scanning Radar Spectra by Beal, R. C., Monaldo, F. M., Tilley, D. G., Irvine, D. E., Walsh, E. J., Jackson, F. C., Hancock, D. W., Hines, D. E., Swift, R. N., Gonzalez, F. I., Lyzenga, D. R., Zambresky, L. F.

“…Directional ocean wave spectra derived from Shuttle Imaging Radar-B (SIR-B) L-band imagery collected off the coast of southern Chile on 11 and 12 October 1984…”
Get full text

Characterization of errors in vector wind retrievals from satellite-based polarimetric microwave radiometer measurements by Laws, K.E., Lyzenga, D.R., Wiberg, D.M., Vesecky, J.F.

“…We present a method for evaluating characteristics of wind vector retrieval errors from polarimetric radiometer measurements. We focus on wind direction errors…”
Get full text