Simplified parametric cost trade-offs in satellite system design

Abstract

In this paper, a parametric cost model for the space segment of a meteorological satellite system is derived and exercised to provide insight into the major economic trade-offs affecting the choice of the satellite's design life and replacement strategy. Trade-offs involving replacement strategy include launch via an expendable booster versus launch via the Space Shuttle; and recovery, repair, and reuse of a failed satellite versus simple replacement with no reuse. The sensitivities of space segment costs to design life, launch costs, replacement costs, and refurbishment costs are examined with explicit inclusion of nonrecurring and recurring costs. The results from an application of the model indicate that routine spacecraft retrieval and reuse of a modestly expensive spacecraft is not a significant economic benefit and that design lifetimes of three or four years are the best choice.