A local current based iterative physical optics method for computing the RCS of target above sea surface

Zhang, Cong; He, Zi; Taiping, Sun; Ding, Dazhi; Chen, Rushan

doi:10.1016/j.enganabound.2022.10.005

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Approximate methods constitute mature and effective computational methods. In general, these methods include geometrical optics (GO) [17], physical optics (PO) [18], iterative physical optics (IPO) [19], geometrical optics and physical optics (GO-PO) [20,21], bidirectional analytic ray tracing (BART) [22], and others. For these ray methods, the shadowing effects for multiple scattering in the optics field [23][24][25] should be considered to improve the calculation accuracy.…”

Section: Introductionmentioning

confidence: 99%

Research on Circular Polarization Composite Scattering Characteristics of Sea Surface and Ship Target at GPS Frequency

Zhao,

Liao,

Liu

et al. 2024

PIER C

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The electromagnetic characteristics analysis of the scattering signals from targets, which usually exist or are hidden in the surrounding environment, is one of the necessary prerequisites for the reliable reception of echo signals. Utilizing the GNSS signals as an opportunistic illumination source for detecting maritime targets has vast development prospect and scientific application value. GNSS signals, including GPS signals, are the right-hand circular polarization waves at L-band. Therefore, in this study, a comprehensive electromagnetic composite scattering model is established under circular polarization, which encompasses sea surface scattering, target single scattering, target multiple scattering, and coupled scattering between the target and sea surface. Then, the research investigates the variation characteristics of different scattering components (including the scattering of sea surface, the first, second, and third-order scattering of target, the total scattering of target, the coupled scattering of target induced by the reflection waves from sea surface, and the coupled scattering of sea surface induced by the reflection waves from target) in the composite scene under different polarizations, incident angles, wind speeds, and headings. The results indicate that the scattering of sea surface under LR polarization (which means that the polarization states of scattering and incident wave are left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP), respectively) is significantly greater than that under RR polarization, while the opposite trend is observed for the target. Therefore, in the applications such as the detection and identification of ship targets on sea surface, it is better to choose the right-hand circular polarization channel to receive the scattering echo signal from target, which could effectively suppress the scattering echo of sea surface. These findings are of crucial significance in enhancing the effectiveness and accuracy of maritime target detection.

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Section: Introductionmentioning

confidence: 99%

Research on Circular Polarization Composite Scattering Characteristics of Sea Surface and Ship Target at GPS Frequency

Zhao,

Liao,

Liu

et al. 2024

PIER C

View full text Add to dashboard Cite

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Dynamic Doppler Characteristics of Maritime Airborne Corner Reflector

Wu,

Hu,

Feng

et al. 2024

JMSE

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The maritime airborne corner reflector (ACR) is a radar reflector that can measure wind speed in an unknown sea area in real time over a long distance. To improve our understanding of how the ACR works, we investigated the Doppler characteristics of the ACR for the first time from a dynamic perspective. First, we constructed a radar echo signal model of the ACR. Then, we obtained the dynamic Doppler characteristics through pulse Doppler processing and discussed the special phenomenon of Doppler broadening. Finally, we proposed a rectangular window decomposition method to analyze the inner principle of the Doppler broadening phenomenon in more detail. In conclusion, this study provides valuable insights into the Doppler characterization of an ACR from a dynamic viewpoint, which contributes to enriching the basic theory of this equipment.

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A local current based iterative physical optics method for computing the RCS of target above sea surface

Cited by 2 publications

References 15 publications

Research on Circular Polarization Composite Scattering Characteristics of Sea Surface and Ship Target at GPS Frequency

Research on Circular Polarization Composite Scattering Characteristics of Sea Surface and Ship Target at GPS Frequency

Dynamic Doppler Characteristics of Maritime Airborne Corner Reflector

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