"High Performance, Radiation Hardened, Ultra Low Power Space Computer Leveraging COTS Microelectronics with SEE Mitigation"

David R. Czajkowski, David J. Strobel, et. al.
Space Micro Inc.


Space Micro has developed an ultra-low power, radiation hardened space computer architecture, which highly leverages commercial microprocessor technology, combining several low power techniques currently used for PDAs and laptop computers, such as dynamic voltage scaling, frequency scaling and software controlled hardware.

In addition, Space Micro has developed a unique patent-pending SEU mitigation technique enables its computers to exceed SEU performance of traditional rad hard computers. The performance of the 32-bit Proton 100K single board computer (SBC) is 1200 MIPS at 350 MHz, with a 5W power budget for the microprocessor. SEL immunity is greater than 70 MeV/mg/cm2 and SEU bit error rates of less than 1E-5 unrecoverable upsets per day.

Electrical simulation data of Space Micro’s new SEU mitigation technology will be presented showing SEU rate improvement for microprocessors. Radiation test data from both proton and heavy ion testing is presented to demonstrate the SEU mitigation and resulting error rates.

This space computer is now scheduled for spaceflight in late 2005. It will be flight qualified on the Air Force Research Labs (AFRL) Rapid Spaceflight Experiment (RSX). In this application, the Proton 100K will act as the Reconfigurable Onboard Processing Experiment (ROPE) and will process camera images for downlinking.


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