High-rate synthetic aperture communications in shallow water

2009 ◽  
Vol 126 (6) ◽  
pp. 3057-3061 ◽  
Author(s):  
H. C. Song ◽  
W. S. Hodgkiss ◽  
W. A. Kuperman ◽  
T. Akal ◽  
M. Stevenson
Keyword(s):  
Shallow Water ◽  
High Rate ◽  
Synthetic Aperture

Modal Mapping in Shallow Water Using Synthetic Aperture Horizontal Arrays

1998 ◽  
Author(s):  
George V. Frisk ◽  
Kyle M. Becker ◽  
James A. Doutt
Keyword(s):  
Shallow Water ◽  
Synthetic Aperture

scholarly journals DInSAR based land deformation detection in the karst landscape of Gunung Sewu

2020 ◽  
Vol 202 ◽  
pp. 04003
Author(s):  
Ridwan Arif Pambudi ◽  
Rijali Isnain Haripa
Keyword(s):  
Tropical Cyclone ◽  
Research Result ◽  
Northern Region ◽  
High Rate ◽  
Synthetic Aperture ◽  
Karst Landscape ◽  
Differential Interferometry ◽  
The Indian Ocean ◽  
Land Deformation ◽  
Preliminary Research

Hydrologic element specifically precipitation was fathomed to contribute in land deformation of karst landscape. Cempaka Tropical Cyclone (TC) had ensued in the last of 2017 in the Indian Ocean implicated to a high rate of rainfall upon the karst landscape of Gunung Sewu. This research aimed to identify the areas where sustained of land deformation due to the Cempaka TC. This research used a method of Differential Interferometry Synthetic Aperture Radar (DInSAR) by utilising a pair of Sentinel-1A satellite imageries to obtain the information of land deformation. The research result demonstrated the karst landscape of Gunung Sewu encountered land deformation after the Cempaka TC had impinged it. The land deformation occurred in the northern region of Gunung Sewu karst landscape in the forms of land uplifting with a range of 1 – 2 mm/year (115.36 km2) and gradually became a land subsidence with a range of -1 - -4 mm/year (989.25 km2) in the southern region of Gunung Sewu karst landscape. This finding was important as a preliminary research to mitigate the hazards and conserve the karst landscape of Gunung Sewu upon the threats of extreme weather in the future.

Geoacoustic inversion in shallow water using broadband synthetic aperture and single hydrophone acoustic data

2011 ◽  
Vol 130 (4) ◽  
pp. 2391-2391
Author(s):  
Bien Aik Tan ◽  
Peter Gerstoft ◽  
Caglar Yardim ◽  
William Hodgkiss
Keyword(s):  
Shallow Water ◽  
Synthetic Aperture ◽  
Geoacoustic Inversion ◽  
Acoustic Data

Nonlinear Fourier Analysis Algorithm and Models for Water Waves in Terms of Surface Elevation, Amplitude Modulations

2019 ◽  
Author(s):  
Alfred R. Osborne
Keyword(s):  
Synthetic Aperture Radar ◽  
Surface Waves ◽  
Shallow Water ◽  
Wave Field ◽  
Deep Water ◽  
Coherent Structures ◽  
Water Waves ◽  
Surface Elevation ◽  
Synthetic Aperture ◽  
Wave Measurements

Abstract This paper addresses two issues with regard to nonlinear ocean waves. (1) The first issue relates to the often-confused differences between the coordinates used for the measurement and characterization of ocean surface waves: The surface elevation and the complex modulation of a wave field. (2) The second issue relates to the very different kinds of physical wave behavior that occur in shallow and deep water. Both issues come from the known, very different behaviors of deep and shallow water waves. In shallow water one often uses the Korteweg-deVries that describes the wave surface elevation in terms of cnoidal waves and solitons. In deep water one uses the nonlinear Schrödinger equation whose solutions correspond to the complex envelope of a wave field that has Stokes wave and breather solutions. Here I make clear the relationships between the two ways of characterizing surface waves. Furthermore, and more importantly, I address the issues of matching the two types of wave behavior as the wave motion passes from deep to shallow water, or vice versa. For wave measurements we normally obtain the surface elevation with a wave staff, resistance gauge or pressure recorder for getting time series. Remote sensing applications relate to the use of lidar, radar or synthetic aperture radar for obtaining space series. The two types of wave behavior can therefore crucially depend on where the instrument is placed on the “ground track” or “field” over which the lidar or radar measurements are made. Thus the matching problem from deep to shallow water is not only important for wave measurements, but also for wave modeling. Modern wave models [Osborne, 2010, 2018, 2019a, 2019b] that maintain the coherent structures of wave dynamics (solitons, Stokes waves, breathers, superbreathers, vortices, etc.) must naturally pass from deep to shallow water where the nature of the nonlinear physics, and the form of the coherent structures, change. I address these issues and more herein. This paper is directed towards the development of methods for the real time measurement of waves by shipboard radar and for wave measurements by airplane and helicopter using lidar and synthetic aperture radar. Wave modeling efforts are also underway.

Multi‐carrier synthetic aperture communication in shallow water.

2011 ◽  
Vol 129 (4) ◽  
pp. 2666-2666
Author(s):  
Taehyuk Kang ◽  
Hee Chun Song ◽  
William Hodgkiss
Keyword(s):  
Shallow Water ◽  
Synthetic Aperture
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