Computer Science
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..695n&link_type=abstract
Advances in Space Research, vol. 14, no. 10, p. 695-699
Computer Science
2
Galactic Cosmic Rays, Random Access Memory, Single Event Upsets, Solar Protons, Synchronous Satellites, Earth Orbital Environments, Goes 7, Prediction Analysis Techniques, Radiation Shielding, Tdr Satellites
Scientific paper
The proton telescope aboard the Geostationary Operational Environmental Satellite (GOES-7) satellite continuously records the proton flux at geosynchronous orbit, and therefore provides a direct measurement of the energetic protons arriving during Solar Energetic Particle (SEP) events. Microelectronic devices are susceptible to Single Event Upset (SEU) caused by both energetic protons and Galactic Cosmic Ray (GCR) ions. Some devices are so sensitive that their upsets can be used as a dosimetric indicator of a high fluence of particles. The 93L422 1K Static Random Access Memory (SRAM) is one such device. Eight of them are on the Tracking and Data Relay Satellite-1 (TDRS-1) satellite in geosynchronous orbit, and collectively they had been experiencing 1-2 upset/day due to the GCR background. During the large SEP events of 1989 the upset rate increased dramatically, up to about 250 for the week of 19 Oct., due to the arrival of the SEP protons. Using the GOES proton spectra, the proton-induced SEU cross section curve for the 93L422 and the shielding distribution around the 93L422, the calculated upsets based on the GOES satellite data compared well against the log of measured upsets on TDRS-1.
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