Near-Field 2-D-Lateral Scan System for RCS Measurement of Full-Scale Targets Located on the Ground

Alvarez, Jesus

doi:10.1109/tap.2019.2905727

Cited by 18 publications

(3 citation statements)

References 29 publications

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“…To avoid these severe interferences, the targets should be put farther in combination with techniques like hard-timegate [3], which is unfavorable for the needs like highresolution imaging or low-scattering targets imaging. Or, it is through repeated experiments together with backgroundsubtraction.…”

Section: Methodsmentioning

confidence: 99%

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Constant-Time-Delay Interferences in Near-Field SAR: Analysis and Suppression in Image Domain

Zhan

Shi

Wei

2022

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium

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Inevitable interferences exist for the SAR system, adversely affecting the imaging quality. However, current analysis and suppression methods mainly focus on the far-field situation. Due to different sources and characteristics of interferences, they are not applicable in the near field. To bridge this gap, in the first time, analysis and the suppression method of interferences in near-field SAR are presented in this work. We find that echoes from both the nadir points and the antenna coupling are the main causes, which have the constant-time-delay feature. To characterize this, we further establish an analytical model. It reveals that their patterns in 1D, 2D and 3D imaging results are all comb-like, while those of targets are point-like. Utilizing these features, a suppression method in image domain is proposed based on low-rank reconstruction. Measured data are used to validate the correctness of our analysis and the effectiveness of the suppression method.

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Section: Methodsmentioning

confidence: 99%

“…or military targets (tank, aircraft, etc.) [3]. And They are also helpful for comprehension of imagery in remote sensing.…”

Section: Introductionmentioning

confidence: 99%

Constant-Time-Delay Interferences in Near-Field SAR: Analysis and Suppression in Image Domain

Zhan

Shi

Wei

2022

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium

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show abstract

“…Although the theory method is becoming more convenient to get RCS approximate values, with the development of the approximation theory and computer technique [11], it is still difficult to simulate the RCS of complex-shaped targets made of composite material [12,13]. In fact, the engineering application cannot entirely rely on computation and must eventually measure the targets indoors or outdoors [14][15][16]. Usually, the far-field RCS of targets is the most interesting.…”

Section: Introductionmentioning

confidence: 99%

RCS Measurement and Characteristic Analysis of a Sea Surface Small Target with a Shore-Based UHF-Band Radar

Xia

Shui

et al. 2022

Electronics

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Effectiveness verification of weapon equipment and the selection of stealth material are inseparable from target radar cross-section (RCS) measurement. For RCS characteristic analysis of sea surface small targets, a fishing vessel was measured using a shore-based ultra-high-frequency (UHF) band radar. In this article, a full program of RCS measurement and characteristic analysis is presented, and three strategies are adopted to guarantee its high precision. For this, a scheme was designed for RCS dynamic measurement, along with the construction of a two-stage median filter to improve target positioning precision, and an RCS estimation procedure with sea clutter removal is elaborated upon, which increases RCS accuracy. Note that the test range satisfies the far-field criterion, and the multipath effect is modified by external calibration in our data. The measurement results reveal that the RCS level of the sea surface small target is sensitive to the aspect angle and wave height at a low grazing angle, but the RCS fluctuation characteristic is not. Therefore, the aspect angle and wave condition must be considered for sea surface small target detection, classification, or identification.

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Design and Implementation of an Outdoors Scattering Measurement Range for Full-Scale Targets

Alvarez

2018

2018 IEEE Conference on Antenna Measurements &Amp; Applications (CAMA)

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Near-Field 2-D-Lateral Scan System for RCS Measurement of Full-Scale Targets Located on the Ground

Cited by 18 publications

References 29 publications

Constant-Time-Delay Interferences in Near-Field SAR: Analysis and Suppression in Image Domain

Constant-Time-Delay Interferences in Near-Field SAR: Analysis and Suppression in Image Domain

RCS Measurement and Characteristic Analysis of a Sea Surface Small Target with a Shore-Based UHF-Band Radar

Design and Implementation of an Outdoors Scattering Measurement Range for Full-Scale Targets

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