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Sensors 2015, 15(6), 13644-13659; doi:10.3390/s150613644

Time-Domain Simulation of Along-Track Interferometric SAR for Moving Ocean Surfaces

1
Department of Ocean Technology, Policy and Environment, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 153-8505, Japan
2
Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 10 March 2015 / Revised: 21 May 2015 / Accepted: 5 June 2015 / Published: 10 June 2015
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [1476 KB, uploaded 10 June 2015]   |  

Abstract

A time-domain simulation of along-track interferometric synthetic aperture radar (AT-InSAR) has been developed to support ocean observations. The simulation is in the time domain and based on Bragg scattering to be applicable for moving ocean surfaces. The time-domain simulation is suitable for examining velocities of moving objects. The simulation obtains the time series of microwave backscattering as raw signals for movements of ocean surfaces. In terms of realizing Bragg scattering, the computational grid elements for generating the numerical ocean surface are set to be smaller than the wavelength of the Bragg resonant wave. In this paper, the simulation was conducted for a Bragg resonant wave and irregular waves with currents. As a result, the phases of the received signals from two antennas differ due to the movement of the numerical ocean surfaces. The phase differences shifted by currents were in good agreement with the theoretical values. Therefore, the adaptability of the simulation to observe velocities of ocean surfaces with AT-InSAR was confirmed. View Full-Text
Keywords: along-track interferometric SAR; time-domain simulation; ocean observation along-track interferometric SAR; time-domain simulation; ocean observation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yoshida, T.; Rheem, C.-K. Time-Domain Simulation of Along-Track Interferometric SAR for Moving Ocean Surfaces. Sensors 2015, 15, 13644-13659.

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