- 期刊
- OpenAccess
GNSS Kinematic Positioning Test Using Modified Signals Received by Smartphones
智慧型手機接收改良信號之GNSS動態定位測試
摘要
Some mobile devices with an Android operating system have already acquired and recorded the GNSS satellite's dual-frequency carrier phase. If this type of smartphone can achieve high-precision GNSS kinematic positioning, the cost of devices will be effectively reduced. It is, then, expected to meet the standard of 20 cm positioning error required in pipeline surveying works. A smartphone of Mi8 was used in this study as a front-end data receiving tool, and the PPK positioning was carried out for a complete check on its operability, accuracy, and modification. The study found that the Mi8 smartphone could not effectively conduct moving observation, the broadcast ephemeris was not useful in data processing, and the positioning performance was unstable during different periods in a day. Importantly, the GNSS modified signal produced by the geodetic antenna and re-radiating kit with sheltering operation is proved to be effective. Its average positioning error could be better than 16 cm, through which it could decrease the error by at least 30% compared to the original signal.
並列摘要
Android系統的部分行動設備，已可進行GNSS衛星雙頻載波相位觀測量之獲取與紀錄。此類型之手機，若可達成高精度GNSS動態定位解算，將可有效降低作業裝置之成本，亦可滿足管線圖資更新測量之20公分定位誤差標準。本研究主要使用Mi8智慧型手機為資料接收工具，並採後處理動態定位模式進行解算，以進行其操作性、精確性及改良性之完整檢核。經測試可知，Mi8相位觀測量並不適用於移動式定位，也不宜使用廣播星曆進行解算，另在同天不同時段之定位表現也不穩定。本研究提出GNSS大地型天線配搭信號轉發套件及遮罩方式所接收之改良信號，其平均誤差可優於16公分，且可較原始信號之誤差至少降低30%。