3 edition of Effects of space plasma discharge on the performance of large antenna structures in earth orbit found in the catalog.
Effects of space plasma discharge on the performance of large antenna structures in earth orbit
Hans-Juergen C. Blume
by National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service in Hampton, Va, [Springfield, Va
Written in English
|Statement||Hans-Juergen C. Blume.|
|Series||NASA technical memorandum -- 89118.|
|Contributions||Langley Research Center.|
|The Physical Object|
PLASMA ANTENNAS Plasma Antennas is a type of radio antenna currently under development. Plasma is used instead of metal for conduction i.e. plasma discharge tubes are used as the antenna element. Plasma antenna are Radio frequency antenna that employ plasma as a guiding medium for electromagnetic radiation. It uses ionized gas instead of metal.  Earth's atmosphere varies with altitude, and its several regions have distinct compositions and physical properties. The ionosphere, where the gas is partly ionized or electrified, extends from approximately 60 to 1, kilometers (40 to miles) above Earth's surface; it is an excellent place to study how electrified gases (plasmas) behave.
The region of space around the Earth occupied by its magnetic field, called the magnetosphere, is filled with plasma created by the atmosphere being ionised by sunlight. The innermost layer of the magnetosphere is the ionosphere, and above that is the plasmasphere. Radiation Effects on Electronics and the Space Environment • Three portions of the natural space environment contribute to the radiation hazard – Solar particles • Protons and heavier ions – SEE, TID, DD – Free-space particles • GCR – For earth-orbiting craft, the earth’s magnetic field provides some protection for GCR – SEE.
Nov. 17, — Tornado-like swirls of space plasma create tumultuous boundaries in the near-Earth environment, letting dangerous high-energy particles slip into near Earth space. If the antenna RF earth connection had a resistance of Ω and the radiation resistance of the vertical antenna was 36Ω (the radiation resistance for a λ/4 vertical), then the loss would be 6dB. The power loss caused by a poor antenna RF ground system is of particular importance when signals are to be transmitted as a poor ground resulting.
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The plasma can effect the passive and active radio frequency operation of large space antennas by inducing corona discharge or strong arcing in the antenna feeds. One such large space antenna is the meter hoop column antenna which consists of a mesh membrane material (tricot knitted gold plated wire) reflector and carbon fiber tension by: 1.
The plasma can effect the passive and active radio frequency operation of large space antennas by inducing corona discharge or strong arcing in the antenna feeds. One such large space antenna is the meter hoop column antenna which consists of a mesh membrane material (tricot knitted gold plated wire) reflector and carbon fiber tension : Hans-Juergen C.
Blume. Get this from a library. Effects of space plasma discharge on the performance of large antenna structures in earth orbit. [Hans-Juergen C Blume; Langley Research Center.]. In this paper, the description of design and performance of our ground based simulation plasma in low earth orbit (LEO) are presented.
Different types of solar arrays and samples of spacecraft’s surface materials have been tested in the vacuum chamber under the effects of the generated by: 5. The plasma can affect the passive and active radio frequency operation of large space antennas by inducing corona discharge or strong arcing in the antenna feeds.
One such large space antenna. materials degradation in space, the low‑Earth orbit (LEO) environment, defined as ‑1, km above Earth’s surface, is a particularly harsh environment for most non‑metallic materials, because single‑oxygen atoms (atomic oxygen [AO]) are present along with all other environmental components (Yang and de Groh, ).
A corona discharge is a process by which a current flows from an electrode with a high potential into a neutral fluid, usually air, by ionizing that fluid so as to create a region of plasma around the electrode. The ions generated eventually pass the charge to nearby areas of lower potential, or recombine to form neutral gas molecules.
When the potential gradient (electric field) is large. An ion thruster or ion drive is a form of electric propulsion used for spacecraft creates thrust by accelerating ions using electricity. An ion thruster ionizes a neutral gas by extracting some electrons out of atoms, creating a cloud of positive ion thrusters rely mainly on electrostatics as ions are accelerated by the Coulomb force along an electric field.
1 Introduction. Space assets (including aircraft) are subject to an environment consisting of different particle populations that often evolve dynamically over time and space, and potentially bringing about deleterious effects on spacecraft electronics and/or life in space (e.g., Feynman & Gabriel, ).Figure 1 summarizes the main space weather impacts and their environmental sources, from a.
All spacecraft interact in some manner with the plasma environment in space, either the natural environment or a self‐induced environment. Early work on plasma spacecraft interactions focused on geosynchronous altitudes where the primary effect is spacecraft charging from the non‐Maxwellian high‐energy plasma environment.
Hiroyuki Koizumi's research works with 1, citations reads, including: Water and xenon ECR ion thruster - comparison in global model and experiment. Space plasma consists soley of ions and electrons. Plasma is overwhemingly the dominant constituent of the universe as a whole.
Yet most people are ignorant of plasmas. In daily life on the surface of planet Earth, perhaps the plasma to which people are most commonly exposed is the one that produces the cool efficient glow from fluorescent lights.
Yusuke Takahashi's 54 research works with citations and 1, reads, including: Aerodynamic instability of an inflatable aeroshell in suborbital re-entry. Plasma can cause an electric charge to accumulate on one part of a spacecraft but not another, sometimes resulting in an electric arc, or discharge.
These electric arcs can disrupt or destroy sensitive electronic components. Gallagher will be able to refine his model with data from the IMAGE satellite, due to launch in February NRL REIE space research and satellite technology Ground-Based Investigation of Near-Earth Space Plasma Processes in the NRL Space Physics Simulation Chamber W.E.
Amatucci, 1 D.D. Blackwell, G.R. Gatling,1 E.M. Tejero,1 C.D. Cothran, 2 D.N. Walker, and E.D. Gillman3 1Plasma Physics Division 2Sotera Defense Solutions, Inc. 3National Research Council Postdoctoral Fellow.
Lightning events could cause ionospheric disturbance on performance of radio signals which could lead to errors. The objective of the study is to inve. Small antennas on the spacecraft can beam weak radio signals back to Earth. The farther away a spacecraft is, the larger the antenna you need to detect its signal.
The largest antenna at each DSN site is 70 meters ( feet) in diameter. Each DSN site features a large meter ( foot) antenna. Giant plasma tubes found in SPACE: Huge structures spotted circling Earth filled with charged particles from the sun.
The discovery was made by a student at the University of Sydney. For larger space systems operating in low-earth polar orbits, a new set Of environment-induced inter-i_ actions will affect the operation of various equipments and subsystems. These _: adverse effect_s may lintit the construction or mechanical performance of large:.,_.
structures in space or limit the power levels available for solar-cell. Plasma and Space Physics Background The presence of radiation in space causes effects in electronic devices.
The effects range from degradation of performance to functional failures. As a result, satellites may experience shortened lifetimes, major failures or even complete “destruction”.
•Affect TV and telephone broadcasting. Antennas High-gain Antenna The high-gain antenna is a 3 meter- (10 foot-) diameter dish antenna for sending and receiving data at high high-gain antenna was deployed shortly after launch (see launch configuration), and will remain deployed for the remainder of the serves as the primary means of communication to and from the high-gain antenna must be pointed.
We present an analysis of ionospheric irregularities at high latitudes during the St. Patrick’s Day storm. Our study used measurements from ~ ground-based GPS stations and GPS receivers onboard five low earth orbit (LEO) satellites—Swarm A, B and C, GRACE and TerraSAR-X—that had close orbit altitudes of ~ km, and the Swarm in situ plasma densities.
The atmospheric gas density becomes low enough to support the conditions for a plasma around earth at about 90 kilometers above Earth's surface. The electrons in plasma gain more energy, and they are very low in mass. They move along Earth's magnetic field lines and their increased energy is enough to escape Earth's gravity.