Abstract
The success of spacecraft depends on their reliability which is influenced by the space environment complexity. This study examines the reliability of interplanetary spacecraft in different regions. We focused on spacecraft in interplanetary space, specifically within the interplanetary boundary. Our analysis excluded planetary landers, probes, and satellites in Earth orbit. 131 spacecraft were studied, with data on launch mass and lifespan recorded. Non-parametric analysis was initially conducted, followed by parametric analysis using the Weibull Distribution. Results showed higher reliability for spacecraft beyond Earth and Mars extremities. Analyses were also done based on spacecraft mass categories to validate reliability effects. Various factors affecting reliability were discussed, including design, integration processes, testing methodologies, and mass constraints.
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