Accession Number : ADA193007

Title :   A Severe Spacecraft-Charging Event on SCATHA in September 1982,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB

Personal Author(s) : Koons, H C ; Mizera, P F ; Roeder, J L ; Fennell, J F

PDF Url : ADA193007

Report Date : 05 Feb 1988

Pagination or Media Count : 30

Abstract : On September 22, 1982, 29 large amplitude electrostatic discharges were detected by the Pulse Analyzer onboard the SCATHA satellite. Seventeen of these pulses exceeded the maximum voltage discrimination level, which was set to 7.4 volts. This was the worst instance of electrostatic discharges encountered to date by the SCATHA satellite. Three different spacecraft anomalies occurred on SCATHA that day, the most serious being a two-minute loss of data. During this same time period, the Surface Potential Monitor experiment aboard the satellite measured the largest differential surface charging observed in the data since the satellite's launch in January 1979. Keywords: Electrostatic discharges; Spacecraft anomalies; Spacecraft charging.

Descriptors :   *ELECTROSTATICS, *ELECTRIC DISCHARGES, *SCIENTIFIC SATELLITES, ANOMALIES, ARTIFICIAL SATELLITES, DISCRIMINATION, ELECTRIC CHARGE, LAUNCHING, MONITORING, PULSE ANALYZERS, SPACECRAFT, VOLTAGE, SPACE ENVIRONMENTS

Subject Categories : Unmanned Spacecraft
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE