Bistatic reverberation from an ocean ridge

Measured broadband reverberation characteristics in Deep Ocean

Broad band reverberation measurements were collected in deep water (2067m) off Vizag. TNT scare charges (0.450 kg) were used as sound sources which were expended from the ship. The signals were recorded using two hydrophones deployed from the ship. The sound speed profile exhibits 63m duct with a limiting ray angle of about 4.47o and lower cut off frequency of 177 Hz. A flat plateau and then su...

Imaging ocean-basin reverberation via inversion

A technique for imaging large areas of the ocean floor by inverting reverberation data is presented. Acoustic returns measured on a horizontally towed line array have fight-left ambiguity about the array's axis and decreasing cross-range resolution for off-broadside beams and more distant scattering sites. By optimal use of data taken with differing array locations and orientations, fight-left ...

Mid-ocean Ridge Tectonics, Volcanism and Geomorphology

Figure 11 Average depth of magma lens reflections beneath ridges versus spreading rate. The curved line shows the depth to the 12003C isotherm calculated from the ridge thermal model of Phipps Morgan J and Chen YJ (1993) Journal of Geophysical Research 98: 6283}6297. Data from different ridges are labeled Reykjanes Ridge (RR), Juan de Fuca Ridge (JdF), Costa Rica Rift (CRR), Lau Basin (Lau), no...

Bistatic Ocean Wave Remote Sensing System by GPS

Polarimetric bistatic radar scattering behavior of the ocean surface

this paper points out the frequency dependence on the polarimetric radar scattering behavior of the ocean surface in the frequency range 1-18 GHz (Lto Ku-band). We treat this problem with a unifying scattering model named Small Slope Approximation (SSA) to evaluate the Normalized Radar Cross Section (NRCS). The calculations were made by assuming the surface-height spectrum of Elfouhaily et al f...