A new method for removing the blackout problem on reentry vehicles

Stenzel, R. L.; Urrutia, J. M.

doi:10.1063/1.4795148

Cited by 58 publications

(16 citation statements)

References 15 publications

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“…The complex dielectric constant of the ith layer is prescribed in Eq. (5). The overall attenuation can then be calculated by the classical FDTD alogrithm.…”

Section: Plasma Electromagnetic Parametersmentioning

confidence: 99%

Telemetry Channel Capacity Assessment for Reentry Vehicles in Plasma Sheath Environment

Shi

Zhao

Yao

et al. 2015

Plasma Sci. Technol.

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Channel capacity is the prerequisite and basis for the design of a communication system. To assess the impact of a harsh plasma environment on the communication system of reentry vehicles, Shannon's information theory is used to evaluate the channel capacity through the estimation results of the signal-to-noise ratio obtained by the communication link budget method. First, the attenuation caused by the plasma sheath is calculated with a stratified medium finite-difference time-domain method for typical S, C and Ka telemetry frequencies in a typical reentry plasma environment. Thereafter, typical telemetry transceiver parameters are considered to estimate the channel capacity. Results show that the S-band channel capacity is almost zero at the altitude of 30-40 km and the plasma attenuation at the C-band is slightly better. However, the blackout phenomenon remains obvious. The Ka-band signal can penetrate the plasma sheath layer with the smallest attenuation, thus significantly increasing the capacity of the channel and it may thus adequately meet telemetry needs.

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“…The complex dielectric constant of the ith layer is prescribed in Eq. (5). The overall attenuation can then be calculated by the classical FDTD alogrithm.…”

Section: Plasma Electromagnetic Parametersmentioning

confidence: 99%

Telemetry Channel Capacity Assessment for Reentry Vehicles in Plasma Sheath Environment

Shi

Zhao

Yao

et al. 2015

Plasma Sci. Technol.

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“…When a reentry vehicle or a supersonic vehicle enters the dense atmosphere at hypersonic velocity (Mach 10-25), the very high kinetic energy of the vehicle is constantly converted into heat, the heat shield material detaches and is ionized along with the surrounding air in the stagnation zone, and a layer of high-temperature plasma shock fluid forms around the spacecraft. The plasma shock fluid, or plasma sheath, can temporarily disrupt radio signals and cause a communications blackout [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Plasma Sheath Velocity on Propagation of Electromagnetic Waves

Guo

2020

IEEE Access

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Hypersonic velocities can theoretically affect the propagation of electromagnetic waves in a plasma sheath covering a vehicle. This article is the continuation of our previous study and, for the first time, investigates the reflection characteristics of electromagnetic waves by a moving bounded plasma slab and examines five typical plasma parameters in detail when the plasma moves parallel to the interface. The results show that the motion of the plasma slab significantly affects electromagnetic propagation, and the reflection coefficient oscillates with the velocity of the plasma sheath. In addition, different physical parameters cause different oscillation characteristics. Various interesting features of the reflection coefficient are obtained, which are very important for researching the propagation of electromagnetic waves in this extreme physical environment or providing reference for researching ''blackouts'' in the future. INDEX TERMS Electromagnetic waves, moving nonuniform bounded plasma, reflection coefficient.

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“…A magnetic window blackout-mitigation scheme is demonstrated. [3], [4], [5] In this paper, the partially ionized air plasma distribution is generated using a single fluid, multi-species model, with average thermophysical properties. Navier-Stokes equations are solved for the flow mixture.…”

Section: Introductionmentioning

confidence: 99%

Electro magnetic wave propagation in the plasma layer of a reentry vehicle

Kundrapu¹,

Loverich²,

Beckwith³

et al. 2014

2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) Held With 2014 IEEE International Conference on High-Power P

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Abstract-The ability to simulate a reentry vehicle plasma layer and the radio wave interaction with that layer, is crucial to the design of aerospace vehicles when the analysis of radio communication blackout is required. Results of aerothermal heating, plasma generation and electromagnetic wave propagation over a reentry vehicle are presented in this paper. Simulation of a magnetic window radio communication blackout mitigation method is successfully demonstrated.

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A new method for removing the blackout problem on reentry vehicles

Cited by 58 publications

References 15 publications

Telemetry Channel Capacity Assessment for Reentry Vehicles in Plasma Sheath Environment

Telemetry Channel Capacity Assessment for Reentry Vehicles in Plasma Sheath Environment

Effect of Plasma Sheath Velocity on Propagation of Electromagnetic Waves

Electro magnetic wave propagation in the plasma layer of a reentry vehicle

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