影像處理資料擷取系統

Gifted Education in National Tainan First Senior High School

遙測衛星影像處理系統，主要包括取像排程（PSS）、資料擷取（DIS）、資料管理（DMS）、資料處理（DPS）與影像品質驗證（IQS）等五個次系統。資料擷取次系統是影像處理系統的關鍵技術，其主要功能是進行影像資料經由X頻段天線接收後的前處理工作，在福衛二號計畫中太空中心採取外購方式取得，福衛五號則是自主研發。2012年太空中心完成福衛五號資料擷取次系統核心程式，包括：解密、解壓縮、解封包。並利用X頻段解調器模擬150 Mbps的遙傳資料進行功能驗證，測試接收與前端處理，如資訊框（Frame）同步與理得所羅門（ReedSolomon）解碼等功能。所有核心程式已通過功能驗證。成功的資料擷取次系統開發經驗，將使得台灣具備完整的衛星遙測處理技術。 The Image Processing System for the remote sensing satellite is composed of five subsystems, including thePlanning and Scheduling Subsystem(PSS), Data Ingestion Subsystem(DIS), Data Management Subsystem(DMS), Data Processing Subsystem(DPS), and Image Quality Subsystem(IQS) . DIS is regarded as a key technologyfor the Image Processing System. It performs the front-end processing of real-time downlink data from anX-band Antenna System. In the FORMOSAT-2 mission, it was procured by outsourcing, but in the FORMOSAT-5mission, it was designed and developed indigenously. In 2012, NSPO accomplished the core functions of DISfor FORMOSAT-5 satellite, such as decryption, decompression, and depacketization. To verify these functions, an X-band emulator was utilized to simulate 150 Mbps of downlink data to perform tests on data acquisition andfront-end processing including frame synchronization and Reed-Solomon decoding. All DIS core functions havepassed the functional qualification test. The experience of successfully developing DIS will help solid satelliteremote sensing technology thrive in Taiwan.