Plasma and Electromagnetic Simulations of Meteor Head Echo Radar Reflections

Dyrud, L. P.; Wilson, Derek; Boerve, Steiner; Trulsen, J.; Pécseli, H. L.; Close, Sigrid; Chen, Chen; Lee, Yoon Jae

doi:10.1007/978-0-387-78419-9_54

Cited by 4 publications

(6 citation statements)

References 27 publications

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“…At the same time, according to equation (3,4,5), the plasma frequency, plasma relative permittivity and wave vector can be obtained as follows: Step 3: The centrosymmetric axis of the target is parallel to the Y axis. For the mth scattering center, the angle between the electromagnetic wave and the normal line of the target surface, that is, the incident angle of the electromagnetic wave is:…”

Section: Modelingmentioning

confidence: 99%

“…Besides the amplitude attenuation and phase change of the target radar echo signal, the plasma sheath itself reflects and generates a radar echo signal [16]- [18]. There are thus two electromagnetic reflection signals in the radar echo, which has been confirmed in meteor plasma radar detection, as shown in Figure 1 [2], [3]. Based on the unique electromagnetic interference phenomenon of plasma sheath, in recent years, the research on the causes of this phenomenon has been gradually carried out, and the new technology of radar jamming using plasma has been developed [19], [20].…”

Section: Introductionmentioning

confidence: 99%

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Establishment of a Wideband Radar Scattering Center Model of a Plasma Sheath

et al. 2019

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A reentry object covered by a plasma sheath will produce two reflective signals in a radar echo, which seriously affects the detection of the reentry object by radar and results in positioning error and even tracking loss. On the basis of the scattering center model and the non-uniform plasma stratification model, the present paper establishes a radar scattering model of a reentry object covered by a plasma sheath. The model effectively retains the plasma distribution and electromagnetic wave propagation characteristics of the plasma sheath. Analysis of the signal components of radar echoes in an example shows to some extent that the non-mirror reflection signal is not generated by the plasma wake.

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Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Establishment of a Wideband Radar Scattering Center Model of a Plasma Sheath

et al. 2019

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“…In [11], the dielectric tensor is derived from the equation of motion presenting charged plasma. By following it, and the principles presented in [32], solid obstacles surrounded by non-magnetized plasma can be modeled with 4 the use of dierential equations as…”

Section: Modelmentioning

confidence: 99%

“…This method is applied to ground penetrating radar simulations in [15], and meteor simulations in the two-dimensional domain in [11] and in the three-dimensional domain in [12]. The models of electromagnetic wave propagation in magnetized plasma have been recently solved in the three-dimensional domain with the FDTD method in [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…By using this model, the dispersive media can be treated in the time domain without convolution. Thin, practically two-dimensional, layers of three-dimensional space are considered with the model in [11], and the model is simulated in the three-dimensional domain in [12]. Due to the recent developments in computing resources, it is possible to improve the accuracy of the numerical simulations or solve more demanding problems.…”

Section: Introductionmentioning

confidence: 99%

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Controlled time integration for the numerical simulation of meteor radar reflections

Räbinä

Mönkölä

Rossi

et al. 2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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We model meteoroids entering the Earth's atmosphere as objects surrounded by non-magnetized plasma, and consider ecient numerical simulation of radar reections from meteors in the time domain. Instead of the widely used nite dierence time domain method (FDTD), we use more generalized nite dierences by applying the discrete exterior calculus (DEC) and non-uniform leapfrog-style time discretization. The computational domain is presented by convex polyhedral elements. The convergence of the time integration is accelerated by the exact controllability method. The numerical experiments show that our code is eciently parallelized. The DEC approach is compared to the volume integral equation (VIE) method by numerical experiments. The result is that both methods are competitive in modelling non-magnetized plasma scattering. For demonstrating the simulation capabilities of the DEC approach, we present numerical experiments of radar reections and vary parameters in a wide range.

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An FDTD model of scattering from meteor head plasma

Marshall

2015

JGR Space Physics

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We have developed a three‐dimensional finite difference time domain (FDTD) model of scattering of radar waves from meteor head plasma. The model treats the meteor head plasma as a cold, collisional, and magnetized plasma, and solves Maxwell's equations and the Langevin equation simultaneously and self‐consistently in and around the plasma. We use this model to investigate scattering of radar waves from a meteor head (the “head echo”) under a range of plasma densities, meteor scale sizes, and wave frequencies. In this way we relate the radar cross section (RCS) to these variable parameters. We find that computed RCS disagrees with previous analytical theory at certain meteor sizes and densities, in some cases by over an order of magnitude. We find that the calculated meteor head RCS is monotonically related to the “overdense area” of the meteor, defined as the cross‐section area of the part of the meteor where the plasma frequency exceeds the wave frequency. These results provides a physical measure of the meteor size and density that can be inferred from measured RCS values from ground‐based radars. Meteoroid mass can then be inferred from the meteor plasma distribution using established methods.

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Plasma and Electromagnetic Simulations of Meteor Head Echo Radar Reflections

Cited by 4 publications

References 27 publications

Establishment of a Wideband Radar Scattering Center Model of a Plasma Sheath

Establishment of a Wideband Radar Scattering Center Model of a Plasma Sheath

Controlled time integration for the numerical simulation of meteor radar reflections

An FDTD model of scattering from meteor head plasma

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