Paper Info
Title
Retrieval of Internal Solitary Wave Amplitude in Shallow Water by Tandem Spaceborne SAR.
Abstract
The accurate estimation of the upper layer thickness in a two-layer ocean is a crucial step in the retrieval of internal solitary wave (ISW) amplitude from synthetic aperture radar (SAR) data. In this paper, we present a method to derive the upper layer thickness and the consequent ISW amplitude by combining two consecutive SAR images with the extended Korteweg-de Vries (eKdV) equation. An ISW case observed twice by the Chinese C-band SAR GaoFen-3 (GF-3) and the German X-band SAR TerraSAR-X (TS-X) with a temporal interval of approximately 11 min in shallow water to the southeast of Hainan Island in the northwestern South China Sea was used to demonstrate the applicability of the method. Using the in situ measurements of temperature and salinity near the observed ISW, the proposed method yielded an ISW amplitude of -4.52 m, in close proximity to -5.66 +/- 1.24 m derived by applying the classic Korteweg-de Vries (KdV) equation based on the continuously stratified theory. Moreover, the climatological dataset of the World Ocean Atlas 2013 (WOA13) was also used with the proposed method in the Hainan case, and the results showed that the method can still provide a reasonable estimate of ISW amplitude in shallow water even when in situ oceanic stratification measurements are absent. The application of our method to derive the ISW amplitude from consecutive SAR images seems highly promising with the increasing emergence of tandem satellites in orbits.
Year
DOI
Venue
2019
10.3390/rs11141706
REMOTE SENSING
Keywords
Field
DocType
internal solitary waves (ISWs),amplitude retrieval,extended Korteweg-de Vries (eKdV) equation,synthetic aperture radar (SAR)
Waves and shallow water,Tandem,Remote sensing,Geology,Amplitude
Journal
Volume
Issue
ISSN
11
14
2072-4292
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Tong Jia101.35
Jianjun Liang200.34
Xiaoming Li35812.51
Kaiguo Fan400.68