福衛五號衛星為第一枚由台灣本土團隊自行研發之遙測衛星，運行軌道為 720 公里高之太陽同步圓形軌 道。其主酬載為自行研發之遙測影像儀，可提供 2 米解析度之全色影像和 4 米解析度之多光譜彩色影像。 福衛五號飛行軟體以韌體形式儲存運行於衛星電腦，共同組成衛星之神經中樞並扮演如同人類大腦的角 色。 福衛五號衛星整體之關鍵系統功能運作，均仰賴飛行軟體之規劃／協調／執行／監控，其層面涵蓋 衛星本體之熱控制次系統、電力次系統、姿態與軌道控制次系統、反應控制次系統、指令與資料管理電腦 次系統、無線通訊等次系統功能。本文將介紹福衛五號衛星飛行軟體設計與測試驗證技術，以及發展過程 所面對的困難與挑戰。

FORMOSAT-5 Flight Software and the Flight Computer compose of the central nervous system of the FORMOSAT-5 satellite. They play the role in the satellite as the brain does in human body. All vital satellite subsystem functions are under the persistent planning/coordination/execution/monitoring of the flight software. These vital functions include the Thermal Control Subsystem (TCS), Electrical Power Subsystem (EPS), Attitude & Orbit Control Subsystem (AOCS), Reaction Control Subsystem (RCS), Command & Data Handling Subsystem (C&DH), Telemetry Telecommand and Control (TT&C). This paper introduces the development, verifi cations and validations strategies taken by the fl ight software team in developing the FORMOSAT-5 fl ight software, as well as the diffi culties and challenges encountered during the development phase.