Analysis of systems hardware flown on LDEF: New findings and comparison to other retrieved spacecraft hardware

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Degradation, Earth Orbital Environments, Long Duration Exposure Facility, Low Earth Orbits, Optical Materials, Spacecraft Construction Materials, Spacecraft Contamination, Hubble Space Telescope, Light Scattering, Optical Equipment, Optical Properties

Scientific paper

The Long Duration Exposure Facility (LDEF) was retrieved in 1990 after spending 69 months in low-earth-orbit (LEO). A wide variety of mechanical, electrical, thermal, and optical systems, subsystems, and components were flown on LDEF. The Systems Special Investigation Group (Systems SIG) was formed by NASA to investigate the effects of the 69 month exposure on systems related hardware and to coordinate and collate all systems analysis of LDEF hardware. This report is the Systems SIG final report which updates earlier findings and compares LDEF systems findings to results from other retrieved spacecraft hardware such as Hubble Space Telescope. Also included are sections titled (1) Effects of Long Duration Space Exposure on Optical Scatter, (2) Contamination Survey of LDEF, and (3) Degradation of Optical Materials in Space.

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