- 學位論文
GNSS雙星單頻與單星雙頻觀測量之運作效益分析
Analysis of GNSS Positioning Using Observations of Two Satellite Systems’ Single Frequency or One Satellite System’s Dual Frequency.
摘要
單頻GPS接收儀雖有低價的優勢，但因僅可接收L1觀測量，便無法有效消除電離層誤差，使得測量距離受限而未被廣泛運用。且臺灣地區目前雖已普遍運用衛星定位技術辦理各項控制測量作業，但均推薦使用測量型之雙頻接收儀。現因全球導航衛星系統(GNSS)的日漸普及，雙星(如GPS/BDS)或多星(如GPS/GLN/BDS)系統的單頻觀測量，可否能與GPS單星系統的雙頻觀測量提供相同等級之定位精度，即是本研究之探討主題。由本文之研究可知，GPS/BDS單頻與GPS雙頻在基線長度2公里以內，其平面坐標精度僅差距0.2公分。另依內政部國土測繪中心作業規範之成果檢核可知，在基線長度7公里以內之空曠區，除GPS單頻不符精度規範外，增加其它星系組合之單頻觀測量皆可符合作業規範之標準。
並列摘要
Although the single-frequency GPS receiver has the advantage of low price, its L1 only observation can not effectively eliminate the ionospheric error, making the measurement distance limited and not widely used. Moreover, although satellite positioning technology has been widely used in Taiwan for control surveys, it is recommended to use the dual-frequency receiver. Due to the increasing popularity of Global Navigation Satellite System (GNSS), single-frequency observation of two satellite system (such as GPS/BDS) or multi-satellite systems (such as GPS/GLN/BDS) can be compared with GPS single satellite system. This study is aimed at examning their positioning performance. It is found that the GPS/BDS single frequency and GPS dual frequency show the difference in plane coordinate accuracy with only 0.2 cm for baseline less than 2 km. In addition, according to the NLSC RTK operation specification, it is known that in the open area within 7 km of the baseline, except GPS single frequency, the single-frequency observation of other satellite system combined can meet the standards.