Initial comparison of SSPM ground test results and flight data to NASCAP simulations

Stevens, Nobby; Staskus, J. V.; Roche, J. C.; Mizera, P. F.

doi:10.2514/6.1980-336

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The material properties specified are those used to conduct the init-ial evaluation of the Scatha Surface Potential Monitor data. 26 A point to be made here is that the maximum differential voltage predicted between the spacecraft structure and shaded Kapton is only about 3 kV. The discharge process postulated for this study is illustrated in Fig.…”

Section: Satellite Charging In a Constant Substormmentioning

confidence: 99%

Modelling of Environmentally Induced Discharges in Geosynchronous Satellites

Stevens

1980

IEEE Trans. Nucl. Sci.

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The NASCAP computer code is used to compute the charging the discharging characteristics of a typical comunications satellite in geosynchronous orbit. For the case of a severe substorm, satellite surface differential charging in sunlight is found to be substantially less than that required to produce discharges in ground simulation studies. A discharge process is postulated involving discharges triggered at edges (or imperfection) followed by discharges to space. The characteristics of such discharges are parametrically varied to evaluate the possible effects on the satellite. It has been found that discharge characteristics inferred from satellite monitors could be caused by predicted space discharges, that single cell discharges to space can reduce surface potential over entire satellite, and that lowdensity electron trajectory computations indicate that discharge generated electrons may not return to the satellite by long trajectories. Current transients predicted do not agree with the available ground simulation results indicating that additional work must be done both analytically and experimentally to understand and fully explain these discrepanc i es.

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Section: Satellite Charging In a Constant Substormmentioning

confidence: 99%

Modelling of Environmentally Induced Discharges in Geosynchronous Satellites

Stevens

1980

IEEE Trans. Nucl. Sci.

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The charging of spacecraft surfaces

Garrett¹

1981

Reviews of Geophysics

387

208

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The buildup of static charge on satellite surfaces is an important issue in the utilization of satellite systems. The analysis of this phenomenon has required important advances in basic charging theory and the development of complex codes to evaluate the plasma sheaths that surround satellites. The results of these theories and calculations have wide application in space physics in the design of systems and in the interpretation of low‐energy plasma measurements. In this review, those aspects of charge buildup on satellite surfaces relevant to the space physics community are summarized. The types of charging processes, models of charge buildup, satellite sheath theories, and charging observations are described with emphasis on basic concepts.

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