Accession Number : ADA185880

Title :   The Aerospace Environment at High Altitudes and Its Implications for Spacecraft Charging and Communications. Conference Proceedings of the Electromagnetic Wave Propagation Panel Symposium Held in The Hague, The Netherlands on 2-6 June 1986.

Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)

Report Date : MAY 1987

Pagination or Media Count : 293

Abstract : Many spacecraft operate at altitudes generally considered above the ionosphere, and more properly considered in the magnetosphere. This is especially true for synchronous altitudes. Whereas, in the ionosphere, the ionization is mostly due to the ionization of the atmosphere by solar ultraviolet radiation, above a few thousand kilometres the background plasma is mostly of solar wind origin, and is much energetic. As a result, spacecraft can charge to quite high potentials and differential potentials can be set up between different portions of a spacecraft, resulting in the generation of spurious pulses that can interfere with the spacecraft electronics, with spacecraft communications, and can even result in the damage of components by arcing or sparking. In polar latitudes, similar phenomena are seen at even lower altitudes. The symposium examined how the magnetospheric and polar plasmas vary as a result of natural causes and man-made perturbations, and the implications of these variations for the charging and differential chargine of spacecraft with their effects, in turn, on spacecraft systems and communications.

Descriptors :   *SYNCHRONOUS SATELLITES, *ELECTRIC CHARGE, *MAGNETOSPHERE, *PLASMAS(PHYSICS), *SYMPOSIA, SPACECRAFT, ELECTROSTATIC CHARGE, IONOSPHERE, SPACE COMMUNICATIONS, SOLAR WIND, ENERGETIC PROPERTIES, ELECTRIC ARCS, SPARKS, WAKE, ELECTRONIC EQUIPMENT, VOLTAGE, COMMUNICATION EQUIPMENT, TRANSIENT RADIATION EFFECTS, ELECTROMAGNETIC INTERFERENCE, AURORAE, POLAR REGIONS, SPACE ENVIRONMENTS, HIGH ALTITUDE, PLASMA SHEATHS.

Subject Categories : Unmanned Spacecraft
      Electricity and Magnetism
      Atmospheric Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE