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題 名 | Using GPS Carrier Phase in Real Time Kinematic Positioning=應用全球定位系統載波相位於即時動態定位 |
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作 者 | 彭新民; 張帆人; 王立昇; | 書刊名 | 中國工程學刊 |
卷 期 | 22:2 1999.03[民88.03] |
頁 次 | 頁193-201 |
分類號 | 440.98 |
關鍵詞 | 全球定位系統; 載波相位平滑虛擬距離法; 未定值搜尋法; GPS; Carrier smoothed code technique; Ambiguity search technique; |
語 文 | 英文(English) |
中文摘要 | 本文提出兩種方法以使用全球定位系(GPS)載波相位值進行即時動態定位。第一種 演算法為載波相位平滑虛擬距離法 (Carrier Smoothed Code, CSC)。 此法結合了虛擬距離 及載波相位以獲得更精確的距離量測量。 第二種方法為未定值搜尋法 (Ambiguity Search) ,利用虛擬距離得出初始解,再利用載波相位觀測量求出未定值,得到精確定位結果。為了 驗證前述的演算法, 本文進行了靜態與動態兩種實驗, 並與穩態時之三次差分 (Triple-Difference) 演算法得出的定位結果進行比較。靜態實驗顯示基線長度誤差分別為 0.5 及 0.2 公尺。而動態實驗之結果則以運動軌跡圖表示。 |
英文摘要 | In this paper, two different techniques of the Global Positioning System (GPS) are investigated to proceed the real time kinematic positioning. The first method is the carrier smoothed code (CSC) technique, in which the pseudoranges and the carrier phase observables are combined to acquire more accurate ranging measurements. In the second method, pseudorange observables are applied for initial position estimation, and carrier phse measurements are used for positioning updates. The ambiguity search (AS) technique is adopted to resolve the carrier phase's integer ambiguity problem. To verify the above algorithms, both static and kinematic experiments were conducted. In the static experiment, two Magnavox 4200 GPS receivers were located on both ends of a fixed baseline 1.21 meters in length. Compared with the steady state triple-difference solutions, the baseline length errors of the CSC and AS techniques were abouts 0.5 meters (1 σ ) and 0.2 meters (1 σ ), respectively. An unmanned boat directed to go through six pre-specified way points was used in the kinematic experiment. Two Motorola Oncore GPS receivers were installed on the boat and the on-site reference station, respectively, for relative positioning. The boat trajectories computed by the different methods are shown in the experimental results. |
本系統中英文摘要資訊取自各篇刊載內容。