Historical Milestones of Electrotechnical Equipment Creation for Active Experiments in the Near-Earth Space by Ukrainian Scientists

2019 ◽  
Author(s):  
Oleh Strelko ◽  
Oleh Pylypchuk ◽  
Yuliia Berdnychenko ◽  
Svitlana Hurinchuk ◽  
Vira Gamaliia ◽  
...  
Keyword(s):  
Earth Space ◽  
Near Earth Space ◽  
Active Experiments ◽  
Electrotechnical Equipment

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

2004 ◽  
Vol 10 (2-3) ◽  
pp. 16-21
Author(s):  
O.F. Tyrnov ◽  
◽  
Yu.P. Fedorenko ◽  
L.F. Chernogor ◽  
◽  
...  
Keyword(s):  
Satellite Observations ◽  
Earth Space ◽  
Near Earth Space ◽  
Wave Disturbances

scholarly journals Dynamical evolution of Oort cloud comets to near-Earth space

2006 ◽  
Vol 2 (S236) ◽  
pp. 43-54 ◽  
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.

An instrument for discrimination between orbital debris and natural particles in near-Earth space

1993 ◽  
Vol 13 (8) ◽  
pp. 133-136 ◽  
Author(s):  
A.J. Tuzzolino ◽  
J.A. Simpson ◽  
R.B. McKibben ◽  
H.D. Voss ◽  
H. Gursky
Keyword(s):  
Orbital Debris ◽  
Earth Space ◽  
Near Earth Space

Calculating a Directional Flux in Near-Earth Space

2021 ◽  
Vol 85 (4) ◽  
pp. 386-388
Author(s):  
V. V. Malakhov ◽  
A. G. Mayorov
Keyword(s):  
Earth Space ◽  
Near Earth Space

Could future COP talks help to de-junk near-earth space?

Soundings ◽  
2021 ◽  
Vol 78 (78) ◽  
pp. 81-85
Author(s):  
Susmita Mohanty
Keyword(s):  
Space Debris ◽  
Outer Space ◽  
Low Earth Orbit ◽  
Observation Data ◽  
Earth Space ◽  
Near Earth Space ◽  
Earth Environment ◽  
Outer Space Treaty ◽  
Earth Observation Data ◽  
Earth’S Climate

Space debris has reached alarming proportions and is growing at a frightening pace, because of the expanding number of satellites circulating in Low Earth Orbit (LEO), designed to increase global Internet coverage and provide earth observation data. LEO satellites are now being launched in mega-constellations, including by Elon Musk's company SpaceX. It is time to completely overhaul the 1967 Outer Space Treaty, which was not designed to deal with current problems. The COP forum should therefore include the near-earth environment within its concept of the earth's climate, enabling the UN to acknowledge, as a collective, the growing menace of human-made debris in near-earth space, and, in partnership with the UN-Outer Space Affairs Office (UN-OOSA), call for a new declaration on LEO.

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