Search Results - "Romeiser, Roland"

THE FUTURE OF SAR-BASED OCEANOGRAPHY: High-Resolution Current Measurements by Along-Track Interferometry by ROMEISER, ROLAND

“…Since the Seasat mission in 1978, an impressive amount of information on oceanic and atmospheric features over the ocean has been derived from the thousands of…”
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On the Correlation Between the SAR Backscatter Modulation and Surface Waves Orbital Velocity by Elyouncha, Anis, Romeiser, Roland

“…A challenging effect in the retrieval of ocean surface currents from synthetic aperture radar (SAR) is the so-called wave-induced Doppler velocity. This effect…”
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Quality Assessment of Surface Current Fields From TerraSAR-X and TanDEM-X Along-Track Interferometry and Doppler Centroid Analysis by Romeiser, Roland, Runge, Hartmut, Suchandt, Steffen, Kahle, Ralph, Rossi, Cristian, Bell, Paul S.

“…All existing examples of current measurements by spaceborne synthetic aperture radar (SAR) along-track (AT) interferometry (ATI) have suffered from short…”
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Theoretical Evaluation of Several Possible Along-Track InSAR Modes of TerraSAR-X for Ocean Current Measurements by Romeiser, R., Runge, H.

“…The German satellite TerraSAR-X, scheduled for launch in late 2006, will permit high-resolution ocean current measurements by along-track interferometric SAR…”
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Instantaneous sea ice drift speed from TanDEM-X interferometry by Dammann, Dyre Oliver, Eriksson, Leif E. B, Jones, Joshua M, Mahoney, Andrew R, Romeiser, Roland, Meyer, Franz J, Eicken, Hajo, Fukamachi, Yasushi

“…The drift of sea ice is an important geophysical process with widespread implications for the ocean energy budget and ecosystems. Drifting sea ice can also…”
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An improved composite surface model for the radar backscattering cross section of the ocean surface: 1. Theory of the model and optimization/validation by scatterometer data by Romeiser, Roland, Alpers, Werner, Wismann, Volkmar

“…An improved composite surface model for the calculation of the normalized radar backscattering cross section (NRCS) of the ocean surface at moderate incidence…”
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Automated retrieval of internal wave phase speed and direction from pairs of SAR images with different look directions by Furtney, Samantha, Romeiser, Roland, Graber, Hans C.

“…Synthetic aperture radar (SAR) is the premier instrument in satellite remote sensing for the detection of oceanic internal waves due to its sensitivity to…”
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X-Band Sea Surface Coherence Time Inferred From Bistatic SAR Interferometry by Suchandt, Steffen, Romeiser, Roland

“…Coherence time plays an important role in ocean surface observation by means of synthetic aperture radar (SAR). For X-band, the autocorrelation function (ACF)…”
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On the remote sensing of oceanic and atmospheric convection in the Greenland Sea by synthetic aperture radar by Romeiser, Roland, Ufermann, Susanne, Androssov, Alexei, Wehde, Henning, Mitnik, Leonid, Kern, Stefan, Rubino, Angelo

“…In this paper we discuss characteristic properties of radar signatures of oceanic and atmospheric convection features in the Greenland Sea. If the water…”
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Advanced Remote Sensing of Internal Waves by Spaceborne Along-Track InSAR-A Demonstration With TerraSAR-X by Romeiser, Roland, Graber, Hans C.

“…Since the SEASAT mission in 1978, satellite-based synthetic aperture radar (SAR) images have been used to study oceanic internal waves. Internal waves become…”
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Open-ocean convection in the Greenland Sea: preconditioning through a mesoscale chimney and detectability in SAR imagery studied with a hierarchy of nested numerical models by Alexey Androsov, Angelo Rubino, Roland Romeiser, Dmitry V. Sein

“…Aspects of the hydrodynamics of the Greenland Sea were investigated through a hierarchy of nested numerical models. The simulations were particularly conceived…”
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Wind Retrieval From Shipborne Nautical X-Band Radar Data by Lund, B., Graber, H. C., Romeiser, R.

“…In this paper, we study the retrieval of wind information from nautical X-band radar data. In contrast to previous studies, where data from stationary research…”
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Empirical Relationship Between the Doppler Centroid Derived From X-Band Spaceborne InSAR Data and Wind Vectors by Elyouncha, Anis, Eriksson, Leif E. B., Romeiser, Roland, Ulander, Lars M. H.

“…One of the challenges in ocean surface current retrieval from synthetic aperture radar (SAR) data is the estimation and removal of the wave-induced Doppler…”
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Measurements of Sea Surface Currents in the Baltic Sea Region Using Spaceborne Along-Track InSAR by Elyouncha, Anis, Eriksson, Leif E. B., Romeiser, Roland, Ulander, Lars M. H.

“…The main challenging problems in ocean current retrieval from along-track interferometric (ATI)-synthetic aperture radar (SAR) are phase calibration and wave…”
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Evaluation of a Linear Inversion Method for retrieval of directional wave spectra from SAR look cross spectra by Brasil-Correa, Yuri O., Violante-Carvalho, Nelson, Santos, Felipe M., Carvalho, Luiz Mariano, Santos, Andre L.C., Costa, Leonardo P.F., Portilla-Yandun, Jesus, Romeiser, Roland

“…•A method is proposed to retrieve wave directional spectra from SAR.•The feasibility of a Linear Inversion Method (LIM) is investigated.•The LIM does not…”
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Coupled Model Simulation of Wind Stress Effect on Far Wakes of Ships in SAR Images by Fujimura, Atsushi, Soloviev, Alexander, Shin Hyung Rhee, Romeiser, Roland

“…A high-resolution 3-D hydrodynamic model capable of simulating far wakes of ships has been implemented using computational fluid dynamics software. We feed the…”
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A simulator of Synthetic Aperture Radar (SAR) image spectra: the applications on oceanswell waves by Santos, Felipe M., Santos, Andre L.C., Violante-Carvalho, Nelson, Carvalho, Luiz Mariano, Brasil-Correa, Yuri O., Portilla-Yandun, Jesus, Romeiser, Roland

“…The Synthetic Aperture Radar (SAR) carried on-board satellites yields invaluable data of global wave spectra since the early 1990s, with several satellites in…”
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Remote sensing of oceanic current features by synthetic aperture radar — achievements and perspectives by Romeiser, Roland, Ufermann, Susanne, Alpers, Werner

“…It is generally accepted that synthetic aperture radar (sar) images can be quite useful for a better understanding of hydrodynamic processes in the ocean,…”
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SATELLITE DOPPLER OBSERVATIONS FOR THE MOTIONS OF THE OCEANS by Ardhuin, Fabrice, Chapron, Bertrand, Maes, Christophe, Romeiser, Roland, Gommenginger, Christine, Cravatte, Sophie, Morrow, Rosemary, Donlon, Craig, Bourassa, Mark

“…Here, Doppler radars can provide valuable observations to measure near-ice current jets and the mesoscale circulation of the emerging Arctic, which play a…”
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Analysis of Internal Wave Signatures in Marine Radar Data by Lund, Bjorn, Graber, Hans C., Jingshuang Xue, Romeiser, Roland

“…Satellite images have long been used to study surface manifestations of internal waves (IWs). More recently, marine X-band radar data have been employed to…”
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