 |
English
|
正體中文
|
简体中文
|
Post-Print筆數 : 27 |
Items with full text/Total items : 113648/144635 (79%)
Visitors : 51574164
Online Users : 894
|
|
|
Loading...
|
Please use this identifier to cite or link to this item:
https://nccur.lib.nccu.edu.tw/handle/140.119/154243
|
| Title: | GNSS連續觀測站遠距頻率校正及定位精度分析 |
| Other Titles: | Analysis of Remote Frequency Calibration and Positioning Precision at GNSS Stations |
| Authors: | 連紫猗;葉大綱;林信嚴;許君韶;陳鶴欽
Lien, Tzu-Yi Lien;Yeh, Ta-Kang;Lin, Shinn-Yan;Hsu, Chun-Shao;Chen, He-Chin |
| Contributors: | 臺灣土地研究 |
| Keywords: | 定位精度;頻率偏移;時間偏差量;頻率穩定度;遠距頻率校正
Frequency Offset;Frequency Stability;GPS Positioning Precision;Remote Frequency Calibration;Phase Offset |
| Date: | 2024-07 |
| Issue Date: | 2024-11-12 10:45:19 (UTC+8) |
| Abstract: | 為維護基本控制點品質，確保土地測量精度，本研究以GPS共視法（GPS common-view）開發GPS遠距頻率校正技術。利用相位法與電碼法解算13處GNSS觀測站之時間偏差量（phase offset），並以頻率穩定度（frequency stability）與頻率偏移（frequency offset）進行精度驗證，所得到的精度有11站與GPS衛星規格（10^(-12)～10^(-11)）相同，顯示GPS遠距頻率校正技術已可應用於台灣測站，未來將透過遊校（on-site calibration）直接比對進行驗證。惟CIME與WARO兩站之頻率穩定度與衛星規格相差3～5個等級，推斷為其內部石英震盪器異常所致。頻率穩定度及頻率偏移對精密單點定位（Precise Point Positioning, PPP）精度的影響大於對靜態相對定位（Static Relative Positioning），由於靜態相對差分定位消除時錶誤差，使頻率穩定度最差的CIME（10^(-7)）及次差的WARO（10^(-8)）其靜態相對定位精度在平面及高程平均達2.4 mm與6.6 mm；而採精密單點定位時，CIME定位精度在平面及高程僅10.1 mm與29.9 mm，顯示當接收儀頻率誤差大時，採用靜態相對定位對維持土地測量的精度較有利。從解算時間對定位精度的影響來看，靜態相對定位在解算時間2小時以上精度即顯著提升（～66%），24小時平面及高程精度最佳達1.1 mm與2.9 mm；而精密單點定位需大於4小時的解算時間方能提升精度，其24小時平面及高程精度最佳為1.9 mm與2.9 mm。
This study aims to maintain the quality of basic control points and ensure land survey precision by devising GPS remote frequency calibration techniques. This study calculates time offset for 13 GNSS observation stations using both the phase method and the code method. The precision is validated through assessments of frequency stability and frequency offset. The resulting precision aligns with that of GPS satellite specifications (10^(-12)~10^(-11)), affirming the applicability of GPS remote frequency calibration techniques to stations in Taiwan. In the future, it will be verified directly through on-site calibration. Notably, the frequency stability of the GNSS observation stations located at CIME and WARO exhibit considerable discrepancies, which is 3 to 5 orders higher than satellite specifications, thereby implying abnormalities within their internal quartz oscillators. The impact of frequency stability and frequency offset on precise point positioning (PPP) precision is greater than that on static relative positioning precision. Since static relative positioning eliminates the clock error, the positioning precision of WARO and CIME with the worst frequency stability (10^(-8)~10^(-7)) is still good (horizontal 2.4 mm and vertical 6.6 mm). It shows that static relative positioning is more beneficial to maintain the precision of land survey than PPP when the frequency error is large. The precision of static relative positioning is significantly improved (~66%) when the time period of data is 2 hours. Computing of 24 hours data can reach the positioning precision to 1.1 mm and 2.9 mm in horizontal and vertical, respectively. However, the precision of PPP is improved when the time period of data is 4 hours. The positioning precision in horizontal and vertical are up to 1.9 mm and 2.9 mm, respectively, when computing by 24 hours data. |
| Relation: | 臺灣土地研究, 26(2), 179-198 |
| Data Type: | article |
| DOI 連結: | https://doi.org/10.6677/JTLR.202407_26(2).0004 |
| DOI: | 10.6677/JTLR.202407_26(2).0004 |
| Appears in Collections: | [臺灣土地研究 TSSCI] 期刊論文
|
Files in This Item:
| File |
Description |
Size | Format | |
|---|
| 26-2-4.pdf | | 1873Kb | Adobe PDF | 23 | View/Open |
|
All items in 政大典藏 are protected by copyright, with all rights reserved.
|
著作權政策宣告 Copyright Announcement1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.
2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(
nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(
nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
