Specification Of The Plasma Environment At Geosynchronous Orbit In The Energy Range 87 Ev To 288 Kev PDF Download

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Specification of the Plasma Environment at Geosynchronous Orbit in the Energy Range 87 EV to 288 KeV.

Specification of the Plasma Environment at Geosynchronous Orbit in the Energy Range 87 EV to 288 KeV.
Author:
Publisher:
Total Pages: 18
Release: 1994
Genre:
ISBN:

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The particle measurements by the P78-2 SCATHA satellite at near geosynchronous altitudes have been analyzed to obtain average electron and proton fluxes in the energy range 87 eV to 288 keV. The variation of the fluxes about the average values is also reported and the average fluxes are compared to those measured during an intense spacecraft charging event on September 22, 1982. These calculations provide a representation of the plasma environment, which can be used to quantify the surface charging of spacecraft materials in geosynchronous orbit.


Ring Current Investigations

Ring Current Investigations
Author: Vania K. Jordanova
Publisher: Elsevier
Total Pages: 334
Release: 2020-06-18
Genre: Science
ISBN: 0128155728

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Ring Current Investigations offers a comprehensive description of ring current dynamics in the Earth’s magnetosphere as part of the coupled magnetosphere-ionosphere system. In order to help researchers develop a deeper understanding of the fundamental physics of geomagnetic storms, it includes a detailed description of energetic charged particles injection, trapping, and loss. It reviews historical and recent advances in observations, measurements, theory and simulations of the inner magnetosphere and its coupling to the ionosphere and other surrounding plasma populations. In addition, it compares the physics of ring currents at other strongly magnetized planets in the solar system, specifically Jupiter, Saturn, Uranus and Neptune, with the ring current system at Earth. Providing a description of the most important space weather effects driven by inner magnetospheric energetic particles during geomagnetic storms and present capabilities for their nowcast and forecast, Ring Current Investigations is an important reference for researchers in geophysics and space science, especially related to plasma physics, the ionosphere and magnetosphere, solar-terrestrial relations, and spacecraft anomalies. Includes an appendix with links to downloadable video clips, illustrating features of ring current and geomagnetic storm dynamics Provides overview of existing state-of-the-art numerical models and links for open-source code downloads Offers guidance on how to develop numerical models within the context of the present-day understanding


Specification of the Natural Plasma Environment at Geosynchronous Orbit

Specification of the Natural Plasma Environment at Geosynchronous Orbit
Author: Sherman E. DeForest
Publisher:
Total Pages: 33
Release: 1978
Genre:
ISBN:

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This work has made extensive use of data taken by instruments funded by NASA contracts NAS 5-10364 (ATS-5) and NAS 5-21055 (ATS-6). Much use has been made of software also developed under the same contracts. The present contract was negotiated as a result of the realization that the UCSD plasma instruments onboard the ATS spacecraft could be used to specify an environmental model which would be of use to the Air Force in developing design specifications for spacecraft to prevent faulty operation due to environmentally induced electrostatic charging. In addition, reorganization and study of the existing data would also be of use in developing models which could be of use in predicting times when hazards to spacecraft from charging might be great. Within the next year, SCATHA will make the first observations from a vehicle specifically designed to study charging at geosynchronous orbit. We expect that refinements to the data presented here will result from that program, and that new models will result.


Specification of Geosynchronous Plasma Environment

Specification of Geosynchronous Plasma Environment
Author: Sherman E. DeForest
Publisher:
Total Pages: 33
Release: 1977
Genre:
ISBN:

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Data from UCSD plasma instruments on the ATS 5 and 6 satellites has been studied to specify the geosynchronous plasma environment as it affects electrostatic charging of spacecraft. The emphasis of the initial study has been primarily to service the needs of the design engineer; while simultaneously establishing the context in which a more general model could be developed. The report includes an environmental specification plus a review of geosynchronous plasma and wave phenomena. (Author).


A Preliminary Specification of the Geosynchronous Plasma Environment

A Preliminary Specification of the Geosynchronous Plasma Environment
Author: Sherman DeForest
Publisher:
Total Pages: 76
Release: 1976
Genre:
ISBN:

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A preliminary specification of the plasma environment of geosynchronous satellites is provided. The plasma electron and ion density histories and temperatures are provided for a few selected days, including periods of substorm activity and eclipse. (Author).


Modeling of the Geosynchronous Orbit Plasma Environment. Part 3. ATS-5 and ATS-6 Pictorial Data Atlas

Modeling of the Geosynchronous Orbit Plasma Environment. Part 3. ATS-5 and ATS-6 Pictorial Data Atlas
Author: Henry B. Garrett
Publisher:
Total Pages: 266
Release: 1979
Genre:
ISBN:

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Data on the geosynchronous plasma environment derived from the UCSD plasma detectors on the ATS-5 and ATS-6 satellites have been carefully compiled into a pictorial atlas. The atlas consists of 12 days of data from 1969 (ATS-5), 38 days from 1970 (ATS-5), 37 days from 1974 (ATS-6), and 8 days from 1976 (ATS-6). The data are 10-min averages of the first four moments of the plasma distribution function for the electrons and ions. The data are presented in the form of spectrograms and line plots along with detailed ephemeris and geophysical information. Two computer tapes are available, the formats of which are given in an appendix. (Author).


Modeling of the Geosynchronous Orbit Plasma Environment. Part 2. ATS-5 and ATS-6 Statistical Atlas

Modeling of the Geosynchronous Orbit Plasma Environment. Part 2. ATS-5 and ATS-6 Statistical Atlas
Author: Henry B. Garrett
Publisher:
Total Pages: 35
Release: 1978
Genre:
ISBN:

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A preliminary statistical analysis of the ATS-5 and ATS-6 geosynchronous plasma data has been carried out. Variations in the electron and ion currents and temperatures, as represented by the single Maxwellian component temperatures T(AVG) and T(RMS), are evaluated with respect to local time and geomagnetic activity. The potential on the satellites is similarly evaluated. Results indicate that the geosynchronous plasma cannot be adequately represented by a simple Maxwellian distribution and that, at the very least, a two component Maxwellian is necessary. The electron current and eclipse potential were found to vary strongly with K sub p while the temperatures only varied weakely. Local time variations in temperature and current were observed but these were outweighted by a significant local time variation in satellite potential which peaked near midnight. An explanation of these results is proposed in terms of a simple model of the time evolution of the plasma following an injection. (Author).