台灣一等衛星控制網之平差計算與精度分析

Adjustment and Accuracy Analysis of Taiwan First Order GPS Control Network

揚名(Ming Yang) ； 曾清凉 (Ching-Liang Tseng) ； 余致義(Jyh-Yih Yu) ； 陳國華(Kwo-Hwa Chen)

《地籍測量：中華民國地籍測量學會會刊》 18卷2期 (1996/06) Pp. 1-27

https://doi.org/10.29609/YYWYLL.199606.0008

摘要

GPS (Global Positioning System)衛星全球定位系統是個新興的大地測量方法，其在數據處理方面與傳統的三角三邊測量有顯著的不同。現今較普遍的GPS資料處理方式是運用單基線法平差模式進行GPS觀測資料之計算。然而由於此方法只考慮了基線兩端測站觀測量之間的相關性，忽略與其他測站之觀測量也有相關性存在，故單基線法理論上並不嚴密。本文顧及GPS觀測資料平差計算之嚴密性，使用多測站－多時段嚴密平差法，在考慮所有同步觀測量之間的相關性下，進行台灣一等GPS控制網觀測資料之解算，以求得到嚴謹可靠之平差成果。並藉由精度分析，適當反映一等GPS控制網之真實精度。台灣一等GPS控制網包含有105個一等衛星控制點，共75個觀測時段，經多測站－多時段嚴密平差後，得到最小約制網點位內部精度平均值，緯度、經度及高程方向分別為±0.2公分、±0.8公分及±1.6公分。追蹤站框架網之內部精度平均值，緯度、經度及高程方向分別為±0.8公分、±1.5公分及±2.7公分。

關鍵字

全球定位系統 ； 大地控制網 ； 多測站－多時段平差法

並列摘要

Global Positioning System (GPS) is a relatively new method for geodetic control and its data handling is very different from the traditional triangulation method. The commonly adopted GPS data processing technique is known as the single baseline procedure, which separates individual baseline computation from network solution based on a selection of independent baselines. The procedure is rigorous if only two GPS receivers observe simultaneously. However, when more than two receivers are operating simultaneously, the procedure is not rigorous because the stochastic information between concurrently observed baselines is neglected.GPS had been used to establish a new first order geodetic control network in Taiwan from 1995 to 1996. The network consists of 105 first order control points with 75 observation sessions. This study discusses the rigorous adjustment strategy know as the multi-station multi-session procedure that was adopted for the establishment of Taiwan first order control network. This research also conducts error analyses of the network in order to reflect its actual accuracy.

並列關鍵字

Global Positioning System ； Geodetic Control Network ； Multi-station Multi-session Adjustment