Beacon-satellite observations of wave disturbances in the plasma of near-earth space

We present an overview, based on satellite observations at low Earth orbits, on electromagnetic radiation from ground power transmission lines at an industrial frequency 50–60 Hz. Particular attention has been given to Chibis-M and DEMETER satellite observations. The electric 40-cm antenna of the micro-satellite often recorded 50–60 Hz radiation (known as Power Line Emission (PLE)) when it flew over industrialized areas of the planet. The PLE spectral amplitude varied from 1.2 to 18 (μV/m)/Hz0.5, which corresponds to the electric field amplitude E~1 μV/m. We report results of numerical calculations of the electromagnetic response of the atmosphere and ionosphere to a large-scale surface emitter at a frequency of 50 Hz. According to simulation results, PLE with an intensity of ~1 μV/m observed on satellites in the nightside ionosphere at midlatitudes can be excited by an unbalanced current 8–10 A in a power transmission line above the earth's crust with conductivity of 10–3 S/m. At middle and low latitudes with an inclined geomagnetic field, the maximum response in the upper ionosphere to the transmission line radiation should be seen shifted equatorward, although this shift is less than that upon guidance by the geomagnetic field. The maximum amplitude of the electromagnetic response of the ionosphere to the power transmission line emission decreases for an inclined geomagnetic field, but insignificantly. To date, the PLE intensity in near-Earth space has turned out to be higher than the intensity of natural radiation in this range (Schumann resonances and ion whistlers), and continues to grow with the technological development of mankind.

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December 2006 solar extreme events and their influence on the near-Earth space environment: “Universitetskiy-Tatiana” satellite observations

Advances in Space Research ◽

10.1016/j.asr.2008.07.019 ◽

2009 ◽

Vol 43 (4) ◽

pp. 489-494 ◽

Cited By ~ 7

Author(s):

I.N. Myagkova ◽

M.I. Panasyuk ◽

L.L. Lazutin ◽

E.A. Muravieva ◽

L.I. Starostin ◽

...

Keyword(s):

Extreme Events ◽

Satellite Observations ◽

Space Environment ◽

Earth Space ◽

Near Earth Space

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MONITORING THE ARTIFICIAL SPACE OBJECTS WITH UKRAINIAN NETWORK OF OPTICAL STATIONS

Odessa Astronomical Publications ◽

10.18524/1810-4215.2021.34.244926 ◽

2021 ◽

Vol 34 ◽

pp. 85-92

Author(s):

Ya.O. Romanyuk ◽

O.V. Shulga ◽

L.S. Shakun ◽

M.I. Koshkin ◽

Ye.B. Vovchyk ◽

...

Keyword(s):

Low Earth Orbit ◽

Satellite Observations ◽

Earth Orbit ◽

Short List ◽

Geostationary Earth Orbit ◽

Earth Space ◽

Near Earth Space ◽

Space Objects ◽

Successes And Challenges

The article describes the successes and challenges of the Ukrainian network of optical stations (UMOS) in recent years in the field of astrometric observations of artificial space objects both in low-Earth orbit (LEO) and geostationary Earth orbit (GEO). UMOS was established in 2012 as a joint partnership of organizations interested in satellite observations for scientific purposes and practical near Earth space monitoring. The main purpose of the UMOS has been (and still is) to combine scientific and technical means with regular optical (positional and / or non-positional) observation. The short list of equipment of the UMOS members are given in the tables. The programs for observations, used methods and obtained results are described in the paper. In conclusion, the advantages of observations of artificial space objects by means of a network are summarized. The experience of UMOS and main results obtained by UMOS can be considered as the first step to create the SSA system of Ukraine.

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Electromagnetic pollution of near-Earth space by power line emission

Solnechno-Zemnaya Fizika ◽

10.12737/szf-73202107 ◽

2021 ◽

Vol 7 (3) ◽

pp. 111-119

Author(s):

Vyacheslav Pilipenko ◽

Eugeny Fedorov ◽

Nikolay Mazur ◽

Stanislav Klimov

Keyword(s):

Transmission Line ◽

Geomagnetic Field ◽

Power Transmission ◽

Line Emission ◽

Power Line ◽

Satellite Observations ◽

Electromagnetic Response ◽

Power Transmission Line ◽

Earth Space ◽

Near Earth Space

We present an overview, based on satellite observations at low Earth orbits, on electromagnetic radiation from ground power transmission lines at an industrial frequency 50–60 Hz. Particular attention has been given to Chibis-M and DEMETER satellite observations. The electric 40-cm antenna of the micro-satellite often recorded 50–60 Hz radiation (known as Power Line Emission (PLE)) when it flew over industrialized areas of the planet. The PLE spectral amplitude varied from 1.2 to 18 (μV/m)/Hz0.5, which corresponds to the electric field amplitude E~1 μV/m. We report results of numerical calculations of the electromagnetic response of the atmosphere and ionosphere to a large-scale surface emitter at a frequency of 50 Hz. According to simulation results, PLE with an intensity of ~1 μV/m observed on satellites in the nightside ionosphere at midlatitudes can be excited by an unbalanced current 8–10 A in a power transmission line above the earth's crust with conductivity of 10–3 S/m. At middle and low latitudes with an inclined geomagnetic field, the maximum response in the upper ionosphere to the transmission line radiation should be seen shifted equatorward, although this shift is less than that upon guidance by the geomagnetic field. The maximum amplitude of the electromagnetic response of the ionosphere to the power transmission line emission decreases for an inclined geomagnetic field, but insignificantly. To date, the PLE intensity in near-Earth space has turned out to be higher than the intensity of natural radiation in this range (Schumann resonances and ion whistlers), and continues to grow with the technological development of mankind.

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Design of X-Band SSPA Based on GaN HEMT for Telemetry Subsystem of Near-Earth Space Missions

AEU - International Journal of Electronics and Communications ◽

10.1016/j.aeue.2021.153781 ◽

2021 ◽

pp. 153781

Author(s):

Peiman Aliparast ◽

Mahmoud T. Noghani ◽

Ahad Farhadi ◽

Ali K. Horestani

Keyword(s):

Space Missions ◽

Earth Space ◽

Near Earth Space ◽

Gan Hemt ◽

X Band

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Dynamical evolution of Oort cloud comets to near-Earth space

Proceedings of the International Astronomical Union ◽

10.1017/s1743921307003055 ◽

2006 ◽

Vol 2 (S236) ◽

pp. 43-54 ◽

Cited By ~ 1

Author(s):

Olga A. Mazeeva

Keyword(s):

Dynamical Evolution ◽

Absolute Magnitude ◽

Oort Cloud ◽

Outer Solar System ◽

Earth Space ◽

Near Earth Space ◽

Long Period ◽

Order Of Magnitude ◽

Orbital Periods ◽

Stellar Perturbations

AbstractThe dynamical evolution of 2⋅105 hypothetical Oort cloud comets by the action of planetary, galactic and stellar perturbations during 2⋅109 years is studied numerically. The evolution of comet orbits from the outer (104 AU <a<5⋅104 AU, a is semimajor axes) and the inner Oort cloud (5⋅103 AU <a<104 AU) to near-Earth space is investigated separately. The distribution of the perihelion (q) passage frequency in the planetary region is obtained calculating the numbers of comets in every interval of Δ q per year. The flux of long-period (LP) comets (orbital periods P>200 yr) with perihelion distances q<1.5 AU brighter than visual absolute magnitude H10=7 is ∼ 1.5 comets per year, and ∼18 comets with H10<10.9. The ratio of all LP comets with q<1.5 AU to ‘new’ comets is ∼5. The frequency of passages of LP comets from the inner Oort cloud through region q<1.5 AU is ∼3.5⋅10−13 yr−1, that is roughly one order of magnitude less than frequency of passages of LP comets from the outer cloud (∼5.28⋅10−12 yr−1). We show that the flux of ‘new’ comets with 15<q<31 AU is higher than with q<15 AU, by a factor ∼1.7 for comets from the outer Oort cloud and, by a factor ∼7 for comets from the inner cloud. The perihelia of comets from the outer cloud previously passed through the planetary region are predominated in the Saturn-Uranus region. The majority of inner cloud comets come in the outer solar system (q>15 AU), and a small fraction (∼0.01) of them can reach orbits with q<1.5 AU. The frequency of transfer of comets from the inner cloud (a<104 AU) to the outer Oort cloud (a>104 AU), from where they are injected to the region q<1.5 AU, is ∼6⋅10−14 yr−1.

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