Mathematics – Logic
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990dres.iafcu....g&link_type=abstract
IAF, International Astronautical Congress, 41st, Dresden, Federal Republic of Germany, Oct. 6-12, 1990. 11 p.
Mathematics
Logic
Magnetic Storage, Mars Probes, Optical Memory (Data Storage), Radiation Tolerance, Semiconductor Devices, Comparison, High Resolution, Reliability Analysis, Technological Forecasting
Scientific paper
A comparison of spaceborne magnetic and semiconductor mass memories is given. Semiconductor memories are competitive up to capacities of some Gigabits. Radiation tolerance is an important requirement to semiconductor memories. The relevant effects within the semiconductor material are described and potential countermeasures are discussed. For missions to the planet Mars single ion effects are more important than total dose effects. The mass memory of the Mars 94 High Resolution Stereo Camera will be based on standard 1 M Dynamic Random Access Memory (DRAM) devices. The memory array will be protected against Single Event Upsets and Latch-ups by Hamming Coding and Latch-up current breakers, respectively. The required reliability is based mainly on massive redundancy. The reliability structure is outlined and discussed in detail. Finally, some figures related to power consumption, mass and mechanics are presented.
Gaertner M.
Gliem Fritz
Krahn Edgar
Rombeck F.-J.
Uwe Keller Horst
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