On-orbit service missions are increasingly gaining interest among the aerospace community, driven by a growing commercial space sector that has developed a market for servicing Earth-orbiting satellites. Such missions may require a formation of satellites to maintain a precise shape with mission-appropriate tolerances, depending on the tasks to carry out. Indeed, over the past two decades, space agencies have questioned the need to use single platforms with a high level of complexity, which is not always associated with a high degree of reliability, a key driver in any space mission. Several studies have shown that spacecraft formations can perform tasks previously accomplished with single space platforms, often large and complex, but employing smaller satellites and therefore significantly lower costs.