比對多衛星組合RTK與e-GNSS在地籍測量上之應用與分析

由於諸多全球導航衛星系統(GNSS)隨著科學發展的日漸成熟，多衛星RTK系統組合儼然成為未來國際上衛星定位技術之研究課題，及地籍測量發展的新趨勢及改革。本文利用多衛星RTK與e-GNSS觀測結果互作比對，應用於地籍圖重測區之圖根測量，透過不同實驗區之作業，探討各自對定位精度之影響。本文研究結果歸納如下：(1)在大溪區RTK 不同衛星組合試驗，從單一GPS 到ALL 衛星組合比較，其平面精度皆提昇33.33%~50%，另e-GNSS 及TTG 測量計算結果，則需改正系統誤差後，才可符合規範，但仍有8%超過±0.03 公尺。(2)在桃園區RTK 不同衛星組合試驗，從單一GPS 到ALL 衛星組合比較，其平面精度皆提昇16.67%~33.33%，另e-GNSS 及TTG 測量計算結果，則需改正系統誤差後，才可符合規範，但仍有24%超過±0.03 公尺。歸納總結，評估本案例在地籍測量的適用性上，多衛星RTK 系統量測結果，較優於e-GNSS 系統。

關鍵字

e-GNSS(即時動態定位系統) ； TTG(三維坐標轉換服務平台) ；地籍圖重測；多衛星RTK系統；圖根測量

並列摘要

Because of many Global Navigation Satellite System(GNSS) organizations getting maturing with the development of science, multi-satellite RTK system become the future research topics of satellite positioning and newly trends of cadastral survey. This research applied multi-satellite RTK system and e-GNSS to implement the supplementary control point surveying on the cadastral resurvey, through different experimental areas of works, and investigated individual influences on the positioning accuracy. The results of those studies are summarized as follow：(1) In Daxi District of multi-satellite RTK combined test，the precision of X-Y planes contrast between single GPS and ALL satellites is increased from 33.33% to 50%. Besides the result of e-GNSS and TTG measurement, they can meet the specifications after correct the system errors, there are still 8% more than ± 0.03m level. (2) In Taoyuan District of multi-satellite RTK combined test，the precision of X-Y planes contrast between single GPS and ALL satellites is increased from 16.67% to 33.33%. Besides the result of e-GNSS and TTG measurement, they can meet the specifications after correct the system errors, there are still 24% more than ± 0.03m level. Therefore, assessing the applicability of cadastral survey, the accuracy of multi-satellite RTK combined system is better than e-GNSS system in current.