Bistatic Dual-Polarization Scattering from Rain and Hail at S- and C-Band Frequencies

Aydin, K.; Park, S. H.; Walsh, T. M.

doi:10.1175/1520-0426(1998)015<1110:bdpsfr>2.0.co;2

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…Extended TBSSs indicate contributions from downscattered paths at larger θ. At such larger θ, the bistatic Z DR (that is, the ratio P H / P V ) decreases (Aydin et al 1998; right side of Fig. 7i).…”

Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 92%

“…Thus, the V-polarized component of the downscattered signal is nonzero, though still much smaller than the H-polarized component. This produces large (but finite) bistatic Z DR (e.g., Aydin et al 1998). In contrast, at these downscattered paths in directions close to straight down, the ratio of ground cross sections (σ H / σ V ) is close to one (Fig.…”

Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 97%

“…The measured Z DR in the PTBSS is the product of three ratios: i. The "bistatic Z DR " (Aydin et al 1998), which is the ratio of the powers of the radiation scattered downward by the hailstones (P H /P V ); ii. The ratio of the ground backscattering cross section at H and V polarizations (σ H / σ V ); and iii.…”

Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 99%

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Principles and applications of dual-polarization weather radar. Part III: Artifacts

Kumjian¹

2013

J. Operational Meteor.

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With the new data collected with polarimetric radars comes a set of new data quality issues and artifacts. It is important for these artifacts to be recognized and understood as such, thereby allowing operational meteorologists to focus on the interpretation of the physically important observations. In this third part of the series, artifacts found in polarimetric radar data are described and explained. These include attenuation and differential attenuation, nonuniform beam filling, depolarization streaks, and three-body scattering signatures. Examples of each are given, along with explanations of what they mean, and how they may be used to provide some information about a storm and its microphysics.

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Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 92%

Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 97%

Section: Polarimetric Three-body Scattering Signaturementioning

confidence: 99%

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Principles and applications of dual-polarization weather radar. Part III: Artifacts

Kumjian¹

2013

J. Operational Meteor.

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“…The second example illustrates a real‐life application of the technique, where we consider an egg‐shaped melting hailstone with a linear radial variation of the relative equivalent permittivity which changes from ε er = 20.71 − j5.23 (wet hail), at the surface, to ε er = 3.14 − j0.004 (dry hail) [ Aydin et al ., ], at the center of the object, as depicted in the inset of Figure . Similarly to the first example, the hailstone is modeled by only seven inhomogeneous curvilinear hexahedral VIE elements with K u = K v = K w = 2, N u = N v = N w = 6, M u = M v = M w = 2, and

N_{unkn}^{normalV normalI normalE} = 5076

.…”

Section: Numerical Resultsmentioning

confidence: 99%

Lagrange‐type modeling of continuous dielectric permittivity variation in double‐higher‐order volume integral equation method

2015

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A novel double-higher-order entire-domain volume integral equation (VIE) technique for efficient analysis of electromagnetic structures with continuously inhomogeneous dielectric materials is presented. The technique takes advantage of large curved hexahedral discretization elements-enabled by double-higher-order modeling (higher-order modeling of both the geometry and the current)-in applications involving highly inhomogeneous dielectric bodies. Lagrange-type modeling of an arbitrary continuous variation of the equivalent complex permittivity of the dielectric throughout each VIE geometrical element is implemented, in place of piecewise homogeneous approximate models of the inhomogeneous structures. The technique combines the features of the previous double-higher-order piecewise homogeneous VIE method and continuously inhomogeneous finite element method (FEM). This appears to be the first implementation and demonstration of a VIE method with double-higher-order discretization elements and conformal modeling of inhomogeneous dielectric materials embedded within elements that are also higher (arbitrary) order (with arbitrary material-representation orders within each curved and large VIE element). The new technique is validated and evaluated by comparisons with a continuously inhomogeneous double-higher-order FEM technique, a piecewise homogeneous version of the double-higher-order VIE technique, and a commercial piecewise homogeneous FEM code. The examples include two real-world applications involving continuously inhomogeneous permittivity profiles: scattering from an egg-shaped melting hailstone and near-field analysis of a Luneburg lens, illuminated by a corrugated horn antenna. The results show that the new technique is more efficient and ensures considerable reductions in the number of unknowns and computational time when compared to the three alternative approaches.

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Data Quality and Measurement Errors

Ryzhkov

Zrnić

2019

Springer Atmospheric Sciences

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Bistatic Dual-Polarization Scattering from Rain and Hail at S- and C-Band Frequencies

Cited by 9 publications

References 32 publications

Principles and applications of dual-polarization weather radar. Part III: Artifacts

Principles and applications of dual-polarization weather radar. Part III: Artifacts

Lagrange‐type modeling of continuous dielectric permittivity variation in double‐higher‐order volume integral equation method

Data Quality and Measurement Errors

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