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Student Number 973202085
Author Ming-Che Wu(巫明哲)
Author's Email Address pyst.py1129@msa.hinet.net
Statistics This thesis had been viewed 647 times. Download 507 times.
Department Civil Engineering
Year 2010
Semester 1
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Improving Single-Frequency GPS Precise Point Positioning Using Ionospheric Models
Date of Defense 2010-09-17
Page Count 74
Keyword
  • GPS.
  • precise point positioning
  • Abstract The precise point positioning (PPP) technique is attractive to researchers because it does not require two or more operating GPS receivers. Single frequency measurements make the solution more challenging due to the ambiguity resolution. While dual-frequency carrier phase measurements can construct an ionosphere-free linear combination to removes first-order ionospheric errors. Precise point positioning technology is different from multiple reference stations. It can not use differential techniques to eliminate error sources, such as satellite orbit errors, receiver’s clock errors, the tropospheric delay, the ionospheric delay and so on.
     We employ measurements of the FORMOSAT-3/constellation observing system for meteorology ionosphere and climate (COSMIC) GPS radio occultation (RO) to construct the Taiwan ionospheric model (TWIM). Compensated for the total electron content is also performed. We employ the TWIM and Klobuchar model to correct ionospheric delay. We developed the ManGo program to process the single-frequency precise point positioning and results will show the positioning errors of single-frequency PPP.
    Table of Content 致謝I
    中文摘要II
    AbstractIII
    目錄IV
    圖目錄VI
    表目錄VIII
    第一章 緒論1
     1.1 文獻回顧1
     1.2 研究動機3
     1.3 論文架構4
    第二章 理論基礎5
     2.1 觀測方程式5
     2.2 平差模式12
     2.3 白化濾波與相位模稜搜尋16
     2.4 方差分量估計18
    第三章 大氣模式改正22
     3.1 對流層延遲22
     3.2 電離層延遲23
     3.3 臺灣自主電離層數值模型25
    第四章 精密單點定位原理28
     4.1 單點定位原理28
     4.2 誤差來源改正29
    第五章 實驗成果與分析34
     5.1 實驗資料背景34
     5.2 實驗處理流程35
     5.3 地球自轉效應37
     5.4 長時間觀測成果40
     5.5 連續兩天觀測成果53
    第六章 結論與建議60
     6.1 結論60
     6.2 建議61
    參考文獻62
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    Advisor
  • Joz Wu(吳究)
  • Files
  • 973202085.pdf
  • approve immediately
    Date of Submission 2010-10-08

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