The ONERA airborne multi-frequency SAR imaging systems

Plessis, Olivier Ruault du; Dreuillet, Philippe

doi:10.1109/radar.2013.6651965

Cited by 7 publications

(2 citation statements)

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“…The radar aéroporté multi-spectral d'Etude des signatures (RAMSES) airborne SAR developed by the French Aerospace Research Agency (ONERA) has a bandwidth of 1200 MHz when working in the X-and Kubands, and can obtain a 2-D high-resolution image of 0.1 m [22], [23]. In 2011, ONERA developed the RAMSES-NG system, with a 4 GHz bandwidth [24], [25]. The PAMIR system is an airborne experimental platform designed by the Institute for High Frequency Physics and Radar Techniques (FHR), and functions in VHR imaging, multi-channel imaging, multipolarization imaging, 3-D imaging, and ground moving target indication [14].…”

Section: Technical Analysismentioning

confidence: 99%

Very High Resolution Synthetic Aperture Radar Systems and Imaging: A Review

Chen,

Dong,

Zhang

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Given its capacity to generate 2-D fine images of observation areas, very high-resolution (VHR) synthetic aperture radar (SAR) has become increasingly popular in myriad fields, including remote sensing, geoscience, and surveillance. In this article, we present a comprehensive overview of VHR SAR systems and imaging to highlight the related research and promote further development. First, we provide a summary of VHR SAR applications and summarize the typical airborne and spaceborne systems. Subsequently, a detailed overview is provided to demonstrate the range VHR technologies by introducing dechirp processing, stepped-frequency, and microwave photonic. Additionally, VHR imaging methods on different platforms, i.e., ideal trajectory, airborne, and spaceborne, are reviewed. Finally, the challenges and prospects of VHR SAR are presented to inform future research directions. This work provides a valuable resource to improve the system design and signal processing of VHR SAR.

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Section: Technical Analysismentioning

confidence: 99%

Very High Resolution Synthetic Aperture Radar Systems and Imaging: A Review

Chen,

Dong,

Zhang

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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“…Results of noncoherent fusion of multiple aspect angles in high resolution SAR images are shown in (Ruault du Plessis and Dreuillet, 2013). Others considered the more general case of nonlinear flight tracks (Frey et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Challenges and Potentials Using Multi Aspect Coverage of Urban Scenes by Airborne Sar on Circular Trajectories

Palm

Pohl

Stilla

2015

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Airborne SAR on small and flexible platforms guarantees the evaluation of local damages after natural disasters and is both weather and daylight independent. The processing of circular flight trajectories can further improve the reconstruction of target scenes especially in complex urban scenarios as shadowing and foreshortening effects can be reduced by multiple views from different aspect angles (hyper-or full-aspect). A dataset collected with the Miranda 35 GHz radar system with 1 GHz bandwidth on a small ultralight aircraft on a circular trajectory over an urban scene was processed using a time domain approach. The SAR processing chain and the effects of the navigational data for such highly nonlinear trajectories and unstable platforms are described. The generated SAR image stack over the entire trajectory consists of 240 individual SAR images, each image visualizing the scene from a slightly different aspect angle. First results for the fusion of multiple aspect views to create one resulting image with reduced shadow areas and the possibility to find hidden targets are demonstrated. Further potentials of such particular datasets like moving target indication are discussed.

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