scholarly journals Interpreting sea surface slicks on the basis of the normalized radar cross‐section model using RADARSAT‐2 copolarization dual‐channel SAR images

2016 ◽  
Vol 43 (6) ◽  
pp. 2748-2757 ◽  
Author(s):  
D. V. Ivonin ◽  
S. Skrunes ◽  
C. Brekke ◽  
A. Yu. Ivanov
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Sea Surface ◽  
Sar Images ◽  
Dual Channel ◽  
Section Model

scholarly journals Incidence angle normalization of Wide Swath SAR data for oceanographic applications

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Konstantinos Topouzelis ◽  
Suman Singha ◽  
Dimitra Kitsiou
Keyword(s):  
Synthetic Aperture Radar ◽  
Cross Section ◽  
Incidence Angle ◽  
Radar Cross Section ◽  
Sea Surface ◽  
Synthetic Aperture ◽  
Progressive Reduction ◽  
Sar Images ◽  
Wide Swath

AbstractA backscattering trend in the range direction of the signal received by Synthetic Aperture Radar (SAR) in Wide Swath (WS) mode results in a progressive reduction of brightness over images from near to far range, which affects the detection and classification of sea surface features on wide swath SAR images. The aim of the present paper is to investigate methods for limiting the issue of Normalized Radar Cross-Section (NRCS or

scholarly journals High-Frequency Radar Cross Section of Ocean Surface for an FMICW Source

2021 ◽  
Vol 9 (4) ◽  
pp. 427
Author(s):  
Hangyu Zhao ◽  
Yeping Lai ◽  
Yuhao Wang ◽  
Hao Zhou
Keyword(s):  
Electric Field ◽  
Cross Section ◽  
High Frequency ◽  
Surface States ◽  
Radar Cross Section ◽  
Second Order ◽  
Sea Surface ◽  
Field Equations ◽  
Wave Radar ◽  
Section Model

The frequency-modulated interrupted continuous waveform (FMICW) has been widely used in remotely sensing sea surface states by high-frequency ground wave radar (HFGWR). However, the radar cross section model of the sea surface for this waveform has not yet been presented. Therefore, the first- and second-order cross section models of the sea surface about this waveform are derived in this study. The derivation begins with the general electric field equations. Subsequently, the FMICW source is introduced as the radar transmitted signal to obtain the FMICW-incorporated backscattered electric field equations. These equations are used to calculate range spectra by Fourier transforming. Therefore, Fourier transformation of the range spectra calculated from successive sweep intervals gives the Doppler spectra or the power spectral densities. The radar cross section model is obtained by directly comparing the Doppler spectra with the standard radar range equation. Moreover, the derived first- and second-order radar cross section models for an FMICW source are simulated and compared with those for a frequency-modulated continuous waveform (FMCW) source. Results show that the cross section models for the FMICW and FMCW cases have different analytical expressions but almost the same numerical results.

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