Interaction of electromagnetic and acoustic waves in a stochastic atmosphere

Bhatnagar, Nishit; Peterson, A.

doi:10.1109/tap.1979.1142091

Cited by 26 publications

(12 citation statements)

References 16 publications

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“…In the present paper, we extend our previous work to the entire intensity prof 'tie. This process of specular reflection from the advected acoustic pulse was hypothesized by North [1974] and Bhatnagar et al [1977] and experimentally verified by Frankel et al [1977].…”

Section: Spot To Miss the Receiving Antennamentioning

confidence: 54%

Spot size of the radar return from a radar‐acoustic sounding system (RASS) due to atmospheric refractive turbulence

Clifford¹,

Wang²,

Priestley³

1978

Radio Science

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We have calculated the intensity profile on the receiving plane of a radar‐acoustic sounding system (RASS) in the presence of varying amounts of atmospheric refractive turbulence. The results indicate that the refractive turbulence produces corrugations in the initially spherical acoustic wavefronts and these corrugations scatter electromagnetic energy over a large solid angle in the backward hemisphere. The net effect is to leave the scattered beamshape nearly unchanged from its form in the case of a homogeneous atmosphere. Of course the on‐axis intensity is reduced considerably but the energy is scattered into such a large solid angle that this produces only an increased background level or tails in the electromagnetic intensity profile.

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Section: Spot To Miss the Receiving Antennamentioning

confidence: 54%

Spot size of the radar return from a radar‐acoustic sounding system (RASS) due to atmospheric refractive turbulence

Clifford¹,

Wang²,

Priestley³

1978

Radio Science

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“…(2) shows that ΔN is closely related to ΔT, ΔP, and Δe. The refractivity fluctuation ΔN can be steered by controlling one or more parameters among ΔT, ΔP, and Δe according to Eq.…”

Section: The Mechanism Of Controlling the Atmospheric Refractivity Flmentioning

confidence: 94%

“…In the next 50 years, radio acoustic sounding system (RASS) began to be established to detect atmospheric temperature, wind profile, and turbulence in the lower troposphere [2][3][4]. The first RASS system to measure atmospheric temperature profile was born at Stanford University [5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Idea of Coherent Acoustic Wave-Induced Atmospheric Refractivity Fluctuation and Its Applications

Gong¹,

Liu²,

Hou³

et al. 2018

Computational and Experimental Studies of Acoustic Waves

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The physical mechanism of generating the lasting tropospheric refractivity fluctuation with a stable array-distributed structure by coherent acoustic waves is investigated. An example of the quantitative calculation of atmospheric refractive index is given and analyzed. Based on the theory of electromagnetic wave propagation and scattering in the troposphere, the feasibility to purposefully affect radio wave propagation is qualitatively demonstrated by the experiment of the coherent acoustic source-induced laser interference fringe change. The potential application aspects of synthetically controlling the radio wave propagation by the artificial refractivity fluctuation structure are preliminarily proposed. This chapter will promote the development of the coherent acoustic wave-induced tropospheric refractivity fluctuation, and it has the important theoretical significance and potential application value to purposely apply the positive or negative effects on radio wave propagation.

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“…The first RASS for measuring the atmospheric temperature profile was made in Stanford University [see North et al , ]. Initially, RASS is used to detect the temperature, the wind profile, and the turbulence in the low troposphere [see Bhatnagar and Peterson , ; Frankel et al , ; Marshall et al ., ; Peters , ]. Currently, RASS can detect the atmospheric parameters below 20 km [see Alexander , ].…”

Section: Introductionmentioning

confidence: 99%

A novel idea of purposefully affecting radio wave propagation by coherent acoustic source‐induced atmospheric refractivity fluctuation

2015

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The mechanism generating the array‐distributed atmospheric refractivity fluctuation by a coherent acoustic source is analyzed. The theoretical model is established, which is used to quantifiably analyze the array structure of the artificial dielectric irregularities. It is qualitatively validated that the array‐distributed artificial dielectric irregularities really exist and that the array structure of the artificial dielectric irregularities and the scattering effect of the artificial dielectric irregularities on a radio wave can be controlled by adjusting and selecting the optimized parameters of the transmitted acoustic wave and the adopted acoustic antenna array. It can be concluded that the array‐distributed artificial dielectric irregularities can be used to purposefully affect radio wave propagation. After radio acoustic sounding system, the idea of this paper is a novel development in the field of the tropospheric atmospheric refractivity artificial abnormality technique and its applications.

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Interaction of electromagnetic and acoustic waves in a stochastic atmosphere

Cited by 26 publications

References 16 publications

Spot size of the radar return from a radar‐acoustic sounding system (RASS) due to atmospheric refractive turbulence

Spot size of the radar return from a radar‐acoustic sounding system (RASS) due to atmospheric refractive turbulence

A Novel Idea of Coherent Acoustic Wave-Induced Atmospheric Refractivity Fluctuation and Its Applications

A novel idea of purposefully affecting radio wave propagation by coherent acoustic source‐induced atmospheric refractivity fluctuation

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