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Progress Toward Predicting High Voltage Charging Of Spacecraft In Low Polar Orbit
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Book Synopsis Progress Toward Predicting High-Voltage Charging of Spacecraft in Low Polar Orbit by : J. G. Laframboise
Download or read book Progress Toward Predicting High-Voltage Charging of Spacecraft in Low Polar Orbit written by J. G. Laframboise and published by . This book was released on 1986 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presented a paper on 'The Aerospace Environment at High Altitudes and its Implications for Spacecraft Charging and Communications, The Hague, Netherlands, 2-6 June 1986. This paper is primarily of a survey nature, and contains relatively brief accounts of several aspects of the low polar orbit high voltage charging problem. However, does present the first results from L.W. Parker's simulation work which was supported by this Contract. This report also contains the text of a paper on an expanded version of an earlier paper on secondary electron escape from negatively charged spacecraft surfaces in a magnetic field, and now includes results for situations in which there exist electric fields tangential as well as normal to the surface.
Book Synopsis Predicting High-Voltage Charging of Spacecraft in Low Polar Orbit by : J. G. Laframboise
Download or read book Predicting High-Voltage Charging of Spacecraft in Low Polar Orbit written by J. G. Laframboise and published by . This book was released on 1985 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this report is in two parts. In the first, we develop a simple approximate prediction of the required conditions for high-voltage polar-orbit charging. The results suggest that for any given spacecraft, surface potentials are likely to depend more strongly on the ratio of ambient flux of high-energy electrons to that of all ions, than on any other environmental parameter. In the second part of this report, we present results of a numerical calculation of secondary-electron escape currents from negatively-charged spacecraft surfaces having various orientations relative to the local magnetic-field direction. Keywords include: Spacecraft charging, Auroral Ionosphere, Computer code, Low polar orbit, and Electron escape.
Book Synopsis High-voltage Charging of Spacecraft in Low Polar Orbit by : J. G. Laframboise
Download or read book High-voltage Charging of Spacecraft in Low Polar Orbit written by J. G. Laframboise and published by . This book was released on 1988 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work first reviews the main differences between the plasma environments in geostationary orbit and low polar orbit with regard to high-voltage charging situations. Section 2 develops a simple rough estimate of the required conditions for overall charging of a large spacecraft in low-orbit auroral-zone conditions. The results indicate that for any given spacecraft, surface potentials are likely to depend more strongly on the ratio of ambient flux of high-energy electrons to that of all ions than on any other environmental parameter, and this prediction has been corroborated by results of Gussenhoven et al for the DMSP satellites. Section 3 presents results from a calculation of escape currents of electrons emitted from negatively-charged spacecraft surfaces having various orientations relative to the direction of the local magnetic field B. The suppression of such currents by B effects indicates that on mostly-dielectric large spacecraft such as the Shuttle Orbiter, local charging, especially on surfaces nearly parallel to B, may occur in ionospheric conditions which do not produce overall charging. Section 4 proposes a wake-induced-barrier-effect mechanism which also suppresses escape of emitted electrons. This effect appears to permit beam-induced as well as polar-orbit high-voltage charging to occur. Section 5 presents preliminary results of numerical simulation work directed toward making detailed tests of these predictions. (jhd).
Book Synopsis Spacecraft Charging in the Auroral Plasma: Progress Toward Understanding the Physical Effects Involved by : J. G. Laframboise
Download or read book Spacecraft Charging in the Auroral Plasma: Progress Toward Understanding the Physical Effects Involved written by J. G. Laframboise and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: After reviewing the main differences between the plasma environments in geostationary orbit and low polar orbit with regard to high-voltage charging situations, we present results from a calculation of secondary-electron escape currents from negatively-charged spacecraft surfaces having various orientation relative to the local magnetic-field direction. We show that for finite ranges of combinations of electric and magnetic field directions, secondary-electron escape is completely suppressed and therefore cannot help to discharge the spacecraft. In such circumstances, secondary electrons may travel distances many times their gyroradii before reimpacting, and this may produce greatly increased secondary-electron surface currents. We then develop a simple rough estimate of the required conditions for high-voltage auroral-zone charging. The results suggest that for any given spacecraft, surface potentials are likely to depend more strongly on the ratio of ambient flux of high-energy electrons to that of all ions, than on any other environmental parameter. Finally, we present preliminary results of numerical simulations directed toward testing this hypothesis. Numerical instabilities encountered in doing this simulation probably are closely related to physical sensitivities inherent in the physics of the ion wake behind the spacecraft.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1987-04 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-latitude Spacecraft Charging in Low-earth Polar Orbit by : Thomas B. Frooninckx
Download or read book High-latitude Spacecraft Charging in Low-earth Polar Orbit written by Thomas B. Frooninckx and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-latitude Spacecraft Charging in Low-earth Polar Orbit by : Thomas B. Frooninckx
Download or read book High-latitude Spacecraft Charging in Low-earth Polar Orbit written by Thomas B. Frooninckx and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Spacecraft Charging by : Shu T. Lai
Download or read book Fundamentals of Spacecraft Charging written by Shu T. Lai and published by Princeton University Press. This book was released on 2012 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: As commercial and military spacecraft become more important to the world's economy and defense, and as new scientific and exploratory missions are launched into space, the need for a single comprehensive resource on spacecraft charging becomes increasingly critical. Fundamentals of Spacecraft Charging is the first and only textbook to bring together all the necessary concepts and equations for a complete understanding of the subject. Written by one of the field's leading authorities, this essential reference enables readers to fully grasp the newest ideas and underlying physical mechanisms related to the electrostatic charging of spacecraft in the space environment. Assuming that readers may have little or no background in this area, this complete textbook covers all aspects of the field. The coverage is detailed and thorough, and topics range from secondary and backscattered electrons, spacecraft charging in Maxwellian plasmas, effective mitigation techniques, and potential wells and barriers to operational anomalies, meteors, and neutral gas release. Significant equations are derived from first principles, and abundant examples, exercises, figures, illustrations, and tables are furnished to facilitate comprehension. Fundamentals of Spacecraft Charging is the definitive reference on the physics of spacecraft charging and is suitable for advanced undergraduates, graduate-level students, and professional space researchers.
Book Synopsis Guide to Mitigating Spacecraft Charging Effects by : Henry B. Garrett
Download or read book Guide to Mitigating Spacecraft Charging Effects written by Henry B. Garrett and published by John Wiley & Sons. This book was released on 2012-05-22 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to the modern body of spacecraft charging knowledge—from first principles for the beginner to intermediate and advanced concepts The only book to blend the theoretical and practical aspects of spacecraft charging, Guide to Mitigating Spacecraft Charging Effects defines the environment that not only creates the aurora, but which also can have significant effects on spacecraft, such as disruption of science measurements and solar arrays from electrostatic discharge (ESD). It describes in detail the physics of the interaction phenomenon as well as how to construct spacecraft to enhance their survivability in the harsh environment of space. Combining the authors' extensive experience in spacecraft charging—and in their provision of design support to NASA, JPL, the commercial satellite market, and numerous other projects—this incredible book offers both a robust physics background and practical advice for neophytes in the field and experienced plasma physicists and spacecraft engineers. In addition to containing numerous equations, graphs, tables, references, and illustrations, Guide to Mitigating Spacecraft Charging Effects covers: Solar cell technology, especially higher voltage arrays, and the new design approaches that are appropriate for them Information about the space plasma environment New analytic computer codes to analyze spacecraft charging Spacecraft anomalies and failures which emphasized designs that are of greater importance than others
Book Synopsis Government Reports Annual Index: Corporate author by :
Download or read book Government Reports Annual Index: Corporate author written by and published by . This book was released on 1987 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1987 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Questions That Need to Be Answered by : H. A. Cohen
Download or read book Questions That Need to Be Answered written by H. A. Cohen and published by . This book was released on 1983 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the proceedings of the 1980 Spacecraft Charging Conference, Parks and Katz used space-charge-limited flow theory to show that large vehicles in a low polar orbit could charge to high potentials due to auroral energetic electrons. The implications of high potentials on spacecraft are serious. From the author's experience with studying the charging and discharging of spacecraft he has prepared a series of questions about large potentials on spacecraft in low polar orbit.
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1987 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Space Station Systems: A Bibliography with Indexes (supplement 6) by :
Download or read book Space Station Systems: A Bibliography with Indexes (supplement 6) written by and published by . This book was released on 1988 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Station Systems written by and published by . This book was released on 1988 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
