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篇目編號00006649
篇名電離層高階項誤差對GPS精密單點定位精度之影響
並列篇名The Higher Order Ionospheric Delay Effect on the Accuracy of GPS Precise Point Positioning
姓名(English Name)林老生(Lao-Sheng Lin) 、洪婉綺(Wan-Chi Hung)
中文摘要全球定位系統(Global Positioning System, GPS)雙頻觀測資料經過處理後,其精密單點定位(Precise Point Positioning, PPP)之精度可達公分等級。然而,對於精度要求較高之應用,如控制測量、地殼變形監測等,公分級精度尚嫌不足。欲進一步提昇PPP之精度,必須考慮電離層二、三階等高階項誤差之改正。本文在於研究電離層高階項誤差對於台灣地區PPP之影響,因此,主要研究議題為探討在:(1)不同方向(2)太陽黑子高、低峰期(3)不同季節(4)不同地區等情況,改正電離層高階項誤差後對PPP精度之影響。
實驗使用之主要軟體與服務有:(1)RINEX_HO程式,(2)gLAB程式,及(3)AUPOS服務。實驗資料,包含5個台灣衛星追蹤站2009年至2015年之GPS觀測資料。根據實驗結果發現,若改正電離層高階項誤差,對於PPP之影響有以下幾點特性:(1)對東西方向的定位精度提昇比例最高,約為63.0%。(2)太陽黑子低峰期之改正效果較佳,定位精度提昇比例為43.0%。(3)夏季、秋季的定位精度提昇比例優於春季及冬季。(4)南部的墾丁站,其精度提昇效果最佳,定位精度提昇比例約為47.3%。
英文摘要The precise point positioning (PPP) accuracy can reach cm level using Global
Positioning System (GPS) dual-frequency data. However, cm level accuracy is insufficient
for high accuracy applications, such as control surveying, deformation monitoring, etc.
To improve the accuracy of PPP, must consider the higher order ionospheric refraction
effects. The purpose of this research is to investigate the effects on PPP accuracies in
Taiwan region caused by higher order ionospheric refraction errors in different situations:
(1) errors in different directions, (2) using observation data in low or higher solar activity
period, (3) using observation data of different seasons, and (4) using observation data of
different areas.
There were two programs and one service applied in this study: RINEX_HO, gLAB
and AUPOS. Test data sets are the observation data from five satellite tracking stations
of Taiwan region of year 2009 to 2015. According to the test results, there are several
characteristics after correcting higher order ionospheric delays. (1) Most significant
effects on the receiver positions occurred in the east-west direction. About 63.0% of PPP
results were improved. (2) Accuracies of corrected PPP results improved 43% when the
solar activity was low. (3) Summer and autumn observation data had better outcome. (4)
The southern station, e.g. KDNM, can get better PPP results. About 47.3% of PPP results
were improved.
頁次59-82
卷期20:2
出版日期2017年11月
中文刊名臺灣土地研究
英文刊名Journal of Taiwan land research