• 作者： 呂福生; 李台生
• 作者服務機構： 國立海洋學院電子工程學系; 海洋運輸學系
• 中文摘要： 羅遠C為一低頻、脈波信號、雙曲線定位系統。由於它的適用範圍涵蓋全球重要水域，接收機操作簡便，定位準度精確，被公認為最佳長距離導航系統之一。除為船艦航行必需裝備，亦應用於飛機導航及地面車輛定位與集結等。本文探討可程式規劃羅遠C模擬發射系統之設計，並解說羅遠C信號特性及羅遠C方程式的意義與原由。模擬發射系統是應用微處理機來研製，所設計的系統可模擬產生全球現有十四個羅遠C鍵的發射信號。利用德卡1024羅遠C接收機實際操演接收，並將模擬的結果與羅遠C海圖比較，證實所研製的模擬系統頗為準確及便利。本文所討論的方法可應用於發展其他雙曲線導航模擬發射系統，對於拓展羅遠C的用途亦將有所裨助。
• 英文摘要： Loran-C is a low-frequency, pulse-signal, hyperbolic position-fixing system. Because of its wide andadequate coverage, handy receiving unit operation, and accurate position-fix capability, the Loran-C systemis regarded as one of the best long-range electronic navigation aids. Loran-C is a necessary electronic in-strument for vessel navigation, in addition to being a guiding system for civil aviation and vehicle monitor-ing. This paper investigates the design of a programmable Loran-C radiating simulation system. Thecharacteristics of the Loran-C signal and the significance of the Loran-C equation are studied. The radiatingsimulator is implemented on the microprocessor system, and it can mimic the existing 14 Loran-C chains ofthe real world. After having performed the receiving exercise by using a Decca Loran-C 1024 receiver, andcomparing the results with Loran-C charts, we find the designed simulation system is accurate and efficient.The technique discussed in this paper can be applied to the design of other hyperbolic position-fixingradiating simulation systems, and this programmable Loran-C simulator will be helpful in exploring forfurther Loran-C applications.
• 中文關鍵字： group repetition interval; hyperbolic navigation
• 英文關鍵字： --