An investigation of bistatic calibration objects

Bradley, Christopher; Collins, P.J.; Fortuny-Guasch, J.; Hastriter, M.L.; Nesti, G.; Terzuoli, A.J.; Wilson, K.S.

doi:10.1109/tgrs.2005.855138

Cited by 33 publications

(30 citation statements)

References 4 publications

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“…The techniques are evaluated on the basis of several factors, namely: sensitivity of calibration to reference object alignment error, sensitivity to antenna polarization impurity, and ease and efficiency of implementation. The analysis of bistatic radar calibration objects is critical to the measurement process and is provided in our companion paper [1] as a distinct contribution.…”

Section: Introductionmentioning

confidence: 99%

An investigation of bistatic calibration techniques

Bradley

Collins

Fortuny-Guasch

et al. 2005

IEEE Trans. Geosci. Remote Sensing

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Abstract-Several popular bistatic calibration techniques are investigated and comparisons made between the relative merits of the various techniques. The analysis addresses sensitivity to object alignment error, sensitivity to polarization impurity, and ease of implementation. Both theoretical concepts and practical considerations are discussed based on measurements accomplished at the European Microwave Signature Laboratory of the European Commission Joint Research Center, Ispra, Italy. This facility has the capability to produce far-field fully polarimetric precision bistatic measurements in a 30-cm-diameter quiet zone, suitable for comparing different calibration methods.

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Section: Introductionmentioning

confidence: 99%

An investigation of bistatic calibration techniques

Bradley

Collins

Fortuny-Guasch

et al. 2005

IEEE Trans. Geosci. Remote Sensing

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“…Indeed, this is due to double and triple reflection contributions which provide a return of the incident wave in several directions. This justifies the employment of the TCR as radar enhancement device for navigational purposes, as appropriate reference target for RCS measurements [1,2] and, also, for the calibration of Synthetic Aperture Radar (SAR) images [3].…”

Section: Introductionmentioning

confidence: 93%

Polarimetric Bistatic Signature of a Faceted Octahedron in High-Frequency Domain

Kubické¹,

Bourlier²,

Saillard³

2007

PIER

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Abstract-In this paper, the bistatic polarimetric signature of a perfectly conducting faceted octahedron with high dimensions with respect to the wavelength, is considered and a closed form solution for its fast computation is developed. This particular object, composed by eight triangularly shaped trihedral corner reflectors, should exhibit a large bistatic and monostatic Radar Cross Section (RCS) over a wide angular range. Scattering from a Trihedral Corner Reflector (TCR) is dominated by single, double and triple reflections. First, shadowed areas in excitation and observation are evaluated with the help of Geometrical Optics (GO). A Physical Optics (PO) integration is performed on each plate for the computation of scattered fields, taking into account the shadowed surfaces. GO is used to take into account the lighting of each face for initial reflections of double and triple reflections. First-order diffractions, which are based on the fringe current expressions for the exterior edges of the TCR are also included in the analysis with the help of Method of Equivalent Currents / Incremental Length Diffraction Coefficients (MEC/ILDC). This permit us to calculate fast the bistatic signature of a TCR for arbitrary incidence and observation angles. The polarimetric bistatic signature of an octahedral reflector is then obtained, and results are discussed. Finally, several prospects are explained.

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“…Thus, it is possible to analyze the relative contribution of each scattering mechanism to the scattered field as in [3].…”

Section: Model Formulation and Computation Processmentioning

confidence: 99%

“…Several canonical shapes, including metal disks and rectangular plates, have scattered fields known with a high degree of accuracy in the specular direction [3]. We have chosen a dielectric cube of dimensions equal to 40 × 40 × 40 mm 3 and relative permittivity 2.35 which is positioned at the center of the plate.…”

Section: Measurement Steps and Calibration Proceduresmentioning

confidence: 99%

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A Rigorous Forest Scattering Model Validation Through Comparison With Indoor Bistatic Scattering Measurements

Bellez¹,

Roussel²,

Dahon³

et al. 2011

PIER B

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Abstract-In this paper, we present numerical simulations and indoor bistatic scattering measurements on scaled targets. The targets are vertical and/or tilted dielectric parallelepipeds representing the main forest elements (tree-trunks and primary branches) at VHF and low-UHF frequencies. They are placed above an aluminum circular plate to simulate a flat ground. The measurements have been conducted in the anechoic chamber of the "Centre Commun de Ressources Microondes" (CCRM) in Marseille, France. A 3D forest scattering model using a Method of Moments (MoM) is deployed to simulate the electric fields scattered by these targets. Two radar geometric, azimuthal and zenithal, bistatic configurations with special attention to the specular direction have been considered. Simulation results and experimental data are confronted for both V V -and HH-polarizations in order to evaluate the accuracy of our model. We have obtained a very good agreement between theoretical and experimental scattered fields for both the magnitude and phase.

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An investigation of bistatic calibration objects

Cited by 33 publications

References 4 publications

An investigation of bistatic calibration techniques

An investigation of bistatic calibration techniques

Polarimetric Bistatic Signature of a Faceted Octahedron in High-Frequency Domain

A Rigorous Forest Scattering Model Validation Through Comparison With Indoor Bistatic Scattering Measurements

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