Spatial variability of ocean waves, from in-situ measurements

In situ measurements of Raman scattering in clear ocean water.

We have further developed and improved the prototype oceanic Fraunhofer line discriminator by using a well-protected fiber-optic-wire cable and in-water electronic housing. We conducted a series of in situ measurements in clear ocean water in the Florida Straits. By comparing the reduced data with the Monte Carlo simulation results, we verify the Raman scattering coefficient B(r) with an excita...

Head waves in ocean acoustic ambient noise: Measurements and modeling.

Seismic interferometry recovers the Green's function between two receivers by cross-correlating the field measured from sources that surround the receivers. In the seismic literature, it has been widely reported that this processing can produce artifacts in the Green's function estimate called "spurious multiples" or the "virtual refracted wave." The spurious multiples are attributed to the hea...

Radar Measurements of Ocean Surface Waves Using Proper Orthogonal Decomposition

Measurements of Ocean Waves and Surface Features using Polarimetric SAR

Studies have shown that polarimetric SAR may be used to measure terrain slopes and surface roughness. The first goal is to extend these measurement concepts here to study slope distribution changes generated by ocean wave-current interactions such as the surface manifestations of internal waves [1]. These changes are then, in turn, used to estimate the perturbations in the ambient slope distrib...

Fine Structure of the Upper Ocean from High-resolution Sar Imagery and In-situ Measurements

Satellite-based radar images of the ocean surface reveal fine features of natural and man-made phenomena in the upper ocean [1–3]. Satellite technology continues to advance as it produces better/higher resolution images of the ocean surface. Fine horizontal features on scales less than the typical scale of the upper ocean mixed layer (about 30–50 m) are often associated with three-dimensional p...