本篇文章說明福衛五號 C&DH (Command & Data Handling) 指令與資料處理次系統之功能架構、發展歷程 與軌道運作現況。C&DH 負責接收、處理來自地面操控中心之上傳指令，以管控衛星構型、調整衛星姿 態、執行拍攝影像任務和科學酬載實驗; 同時亦執行飛行軟體之電力、熱控、姿態控制功能，收集衛星狀 態資料下傳地面站，以研判衛星健康狀況。本次系統主要元件為 OBC (On Board Computer) 衛星電腦，為 國內首次自製，由太空中心進行電氣與電路設計，中科院則執行機械、熱控設計以及製作組裝。

This paper introduces FORMOSAT-5 C&DH (Command & Data Handling) subsystem related with function, architecture, development fl ow and orbit operation status. C&DH is to receive and handle the ground stations uplink TC (Telecommand). It performs TC to control satellite configurations, adjust attitude, take images and conduct science payload experiments. Simultaneously, it executes FSW (Flight Software) for Power/Thermal/Attitude control. The satellite SOH (Status of Health) data are also collected and downlinked to the ground stations for monitor and analysis.OBC (On Board Computer) is the key component of C&DH. It’s fi rst indigenous component in Taiwan. NSPO is responsible for electrical circuit design. NCSIST is responsible for mechanical & thermal design, PCB & chassis productions and assembly.