Additional background radiation of the atmosphere D layer within the frequency range from 0.8 to 6.0 GHz

Голубков, Г. В.; Голубков, М. Г.; Манжелий, М. И.

doi:10.1134/s1028335813100066

Cited by 20 publications

(9 citation statements)

References 2 publications

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“…It was shown [6][7][8] that, at altitudes from 60 to 110 km, the Sun flares produce a super background ultra high frequency UHF radiation with intensity hundreds of times higher the typical levels of microwave solar bursts. An analysis of the different mechanisms of generation of the detected radiation showed that the largest contribution to the resulting spectrum picture comes from the transitions between Rydberg states of the neutral components of a non-equilibrium two-temperature plasma excited by fluxes of sunlight and slow electrons penetrating in the low ionosphere [1][2][3][4].…”

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

“…A large number of original articles, reviews, and monographs are devoted to the remote sensing of the Earth's surface (see, for example, the lists of publications in [1,2]). However, these publications do not take the delay in the propagation distortion of radio waves as a result of resonant scattering during the passage of D and E layers of the ionosphere at an altitude of 60-110 km into account [7]. In addition, they do not take into account both a direct super background microwave radiation coming to the satellite from the D and E layers of ionosphere and the signal attenuation due to the interaction with charged aerosol layers [1][2][3].…”

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

“…At the same time, the authors of this work suggested that radiation reflected from grass or leaf cover wetted by rain might be partially polarized. Because, as indicated above, the radiation sources from the D and E layers of the ionosphere are not coherent [7], there is no sense to discuss the influence of the Faraday effect. In fact, during quadrature decomposition of a non-monochromatic signal in the receiver band near the frequency of 1.4 GHz, such a rotation of the polarization vector and a change in its modulus should be observed that is completely determined by the dynamic state of the atmosphere [7].…”

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

“…Because, as indicated above, the radiation sources from the D and E layers of the ionosphere are not coherent [7], there is no sense to discuss the influence of the Faraday effect. In fact, during quadrature decomposition of a non-monochromatic signal in the receiver band near the frequency of 1.4 GHz, such a rotation of the polarization vector and a change in its modulus should be observed that is completely determined by the dynamic state of the atmosphere [7]. At the same time, when analyzing the data in the framework of the SMOS (Soil Moisture and Ocean Salinity) program, a significant difference was found between the readings of sensors installed on an airplane at an altitude of 3 km and sensors that are located above the Earth's surface at an altitude of 150 m [19].…”

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

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The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

et al. 2020

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The main problems of remote sensing of the Earth’s surface within the frequency range 1.2–1.6 GHz are discussed. They are related to the resonant quantum properties of the radio wave propagation medium in the lower ionosphere. It is shown that, for the passive remote sensing, the main source is incoherent microwave radiation of the D and E ionospheric layers in the decimeter range. For the first time, a theoretically grounded principally new scheme of measurements is suggested. The scheme assumes that the radiation source exists below the satellite orbit and accounts for the fact that two types of radiation (direct and reflected) reach the satellite sensor. The separation of the respective fluxes is a serious problem that should be solved for the correct interpretation of the measurements. The question is raised regarding the correct calibration of measuring equipment, depending on the current state of the ionosphere.

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Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

Section: Passive Remote Sensing State Of Artmentioning

confidence: 99%

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The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

et al. 2020

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“…The selectivity of the effect at the frequencies L 1 and L 2 is due to the nonmonotonic character of the UHF spectrum which depends on the level of solar activity [24] [25] [26]. In the mentioned publications, the basement of the theory was developed and the "Rydberg" program was created.…”

Section: Incoherent High Frequency Radiationmentioning

confidence: 99%

Quantum Nature of Distortion and Delay of Satellite Signals II

Голубков¹,

Манжелий²,

Eppelbaum³

2018

POS

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A detailed analysis of the influence of Rydberg states to the behavior of GPS satellite signals in the D and E atmospheric layers has been carried out. It is demonstrated that these states are the main reason for the GPS signal distortion. It is shown that the behavior of satellite signals is associated with the spectral characteristics of the UHF radiation of the Rydberg states depending on the geomagnetic conditions of ionosphere. The foundations of the quantum theory of distortion and delay of GPS satellite signal propagation through D and E atmospheric layers are analyzed and expounded. The problem reduces to the resonant scattering of photons, moving in the electromagnetic field of the signal, to the Rydberg complexes populated in a two-temperature non-equilibrium plasma. The processes of creation of additional photons because of stimulated emission and resonance scattering of photons are considered. In the present work, the quantum theory of the propagation of a satellite signal in the Earth's upper atmosphere, firstly earlier proposed by the same authors, is described in detail. The general problems of the theory and possible theoretical and applied consequences are discussed. It is explained that two main processes occurring here, are directly related to the resonant quantum properties of the propagation medium. The first process leads to a direct increase in the power of the received signal, and second-to a shift in the signal carrier frequency ν ∆ and the time delay τ ∆ of its propagation. The main reasons of the processes are scattering of the Rydberg electron by the ion core and presence of the neutral medium molecule in the intermediate autoionization states of the composite system populated by the strong non-adiabatic coupling of electron and nuclear motions. The main purposes of our investigation are the physical justification of the formation of parameters ν ∆ and τ ∆ using the quantum dynamics of the electron behavior in the intermediate state of the Rydberg complex A**M and the esti-

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Optical Quantum Properties of GPS Signal Propagation Medium—D Layer

Голубков

Манжелий

et al. 2014

The Atmosphere and Ionosphere

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Additional background radiation of the atmosphere D layer within the frequency range from 0.8 to 6.0 GHz

Cited by 20 publications

References 2 publications

The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

The Problems of Passive Remote Sensing of the Earth’s Surface in the Range of 1.2–1.6 GHz

Quantum Nature of Distortion and Delay of Satellite Signals II

Optical Quantum Properties of GPS Signal Propagation Medium—D Layer

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