A Preliminary Analysis of the Effect of Work-Arounds on Space System Performance and Procurement Requirements — A Proposal

by Gary Parish, William Sollfrey


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This Note identifies a factor that appears to have been neglected in explaining the discrepancy between predicted and observed satellite lifetimes in orbit. This factor — extension of satellite life through ingenious "work-around" corrections — is not represented in current satellite replenishment models. The Note explores the effect of the omission on various measures of system performance, develops an analytical method of incorporating these work-arounds in replenishment models, and derives an initial estimate of the required parameters from a convenient database. Incorporating the effect of work-arounds dramatically improves system performance and lowers procurement requirements.

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