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

Голубков, Г. В.; Манжелий, М. И.; Berlin, A. A.; Eppelbaum, Lev; Lushnikov, A. A.; Morozov, I. I.; Дмитриев, А. В.; Адамсон, С. О.; Dyakov, Yuri A.; Morozov, A.; Голубков, М. Г.

doi:10.3390/atmos11060650

Cited by 13 publications

(5 citation statements)

References 38 publications

(75 reference statements)

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“…Moreover, for the levels related to the vibrational excited states of the A+ ion (located near the corresponding levels of the series v = 0), the connection with the dissociative continuum increases substantially [17]…”

Section: Discussionmentioning

confidence: 99%

Quantum Theory of Disturbance and Delay of GPS Signals in D and E Atmospheric Layers: An Introduction

Голубков¹,

Манжелий²,

Eppelbaum³

2018

POS

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GPS signals play a very important role in the modern industry, science, tourism, military and domestic operations. However, GPS signals are not free from some mistakes caused by disturbances appearing in D and E layers of the atmosphere. A quantum approach is proposed to the theory of propagation of a satellite GPS signal through the D and E layers of the atmosphere, which reduces to the problem of scattering of photons moving in the electromagnetic field of a signal in Rydberg complexes formed in a two-temperature non-equilibrium plasma. The processes of creation of additional photons as a result of stimulated emission and resonance scattering of photons are considered. It is shown that the first process leads to a direct increase in the power of the received signal, and the second to a shift in the signal carrier frequency and the time delay of its propagation. This occurs because of the scattering of the Rydberg electron by the ion core and 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.

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Section: Discussionmentioning

confidence: 99%

Quantum Theory of Disturbance and Delay of GPS Signals in D and E Atmospheric Layers: An Introduction

Голубков¹,

Манжелий²,

Eppelbaum³

2018

POS

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“…It sets a priori information for each voxel before the iteration begins in the tomographic region. The kth iteration of ART algorithm computes the difference between Y and Y k which is obtain by using the current estimated value X k in Eq (4) [35][36][37]. A correction derived from the difference is distributed over X k to get X k+1 .…”

Section: Classic Methods and Problemmentioning

confidence: 99%

An improved method using adaptive smoothing for GNSS tomographic imaging of ionosphere

Jia

Xing

et al. 2021

PLoS ONE

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Global navigation satellite system (GNSS) is a well-established sensors in the recent ionosphere research. By comparing with classical meteorological equipments, the GNSS application can obtain more reliable and precious ionospheric total electron content (TEC) result. However, the most used GNSS ionospheric tomography technique is sensitive to a priori information due to the sparse and non-uniform distribution of GNSS stations. In this paper, we propose an improved method based on adaptive Laplacian smoothing and algebraic reconstruction technique (ALS-ART). Compared with traditional constant constraints, this method is less dependent on a priori information and adaptive smoothing constraints is closer to the actual situation. Tomography experiments using simulated data show that reconstruction accuracy of ionospheric electron density using ALS-ART method is significantly improved. We also use the method to do the analysis of real observation data and compare the tomography results with ionosonde observation data. The results demonstrate the superiority and reliability of the proposed method compared to traditional constant constraints method which will further improve the capability of obtaining precious ionosphere TEC by using GNSS.

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“…[33,70,110] Similarly, the appreciable abundance of electronically excited species significantly affects the propagation of radio waves both in nonthermal (low-temperature) and thermal plasmas. [111,112] Specifically, the knowledge of polarizability and dipole moment variation of species in excited states in comparison with the ground states is essential for analyzing electromagnetic wave propagation in low-temperature plasma in relation to the problems of the reliable operation of onboard instrumentation during spacecraft launching and reentry, [30,112] remote sensing of atmosphere, [113,114] and robust satellite-based location tracking. [113,115] In addition, enhanced polarizability of electronically excited states governs to some extent the reaction kinetics and molecular transport in thermal and nonthermal reacting gas flows.…”

Section: Introductionmentioning

confidence: 99%

A simple semiempirical model for the static polarizability of electronically excited atoms and molecules

2023

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We present a semiempirical analytical model for the static polarizability of electronically excited atoms and molecules that requires very few readily accessible input data, including the ground-state polarizability, elemental composition, ionization potential, and spin multiplicities of excited and ground states. This very simple model formulated in a semiclassical framework is based on a number of observed trends in polarizability of electronically excited compounds. To adjust the model, both accurate theoretical predictions and reliable measurements previously reported elsewhere for a broad range of multielectron species in the gas phase are utilized. For some representative compounds of general concern that have not yet attracted sufficient research interest, the results of our multireference second-order perturbation theory calculations are additionally engaged. We show that the model we developed has reasonable (given the considerable uncertainties in the reference data) accuracy in predicting the static polarizability of electronically excited species of arbitrary size and excitation energy. These findings can be useful for many applications, where there is a need for inexpensive and quick assessments of the static gas-phase polarizability of excited electronic states, in particular, when building the complex nonequilibrium kinetic models to describe the observed optical refractivity (dielectric permittivity) of nonthermal reacting gas flows.

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

Cited by 13 publications

References 38 publications

Quantum Theory of Disturbance and Delay of GPS Signals in <i>D</i> and <i>E</i> Atmospheric Layers: An Introduction

Quantum Theory of Disturbance and Delay of GPS Signals in <i>D</i> and <i>E</i> Atmospheric Layers: An Introduction

An improved method using adaptive smoothing for GNSS tomographic imaging of ionosphere

A simple semiempirical model for the static polarizability of electronically excited atoms and molecules

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

Cited by 13 publications

References 38 publications

Quantum Theory of Disturbance and Delay of GPS Signals in &lt;i&gt;D&lt;/i&gt; and &lt;i&gt;E&lt;/i&gt; Atmospheric Layers: An Introduction

Quantum Theory of Disturbance and Delay of GPS Signals in &lt;i&gt;D&lt;/i&gt; and &lt;i&gt;E&lt;/i&gt; Atmospheric Layers: An Introduction

An improved method using adaptive smoothing for GNSS tomographic imaging of ionosphere

A simple semiempirical model for the static polarizability of electronically excited atoms and molecules

Contact Info

Product

Resources

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Quantum Theory of Disturbance and Delay of GPS Signals in <i>D</i> and <i>E</i> Atmospheric Layers: An Introduction

Quantum Theory of Disturbance and Delay of GPS Signals in <i>D</i> and <i>E</i> Atmospheric Layers: An Introduction