發(fā)布時間：2018-02-11 16:48

  本文關(guān)鍵詞： 實時精密單點定位技術(shù) 擴(kuò)展Kalman濾波（EKF） 非差模糊度固定 整數(shù)鐘差 大氣可降水量 VMF1格網(wǎng)數(shù)據(jù) GPT模型 天頂電離層總電子含量（VTEC）　出處：《解放軍信息工程大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來，，精密單點定位技術(shù)逐步朝著在少數(shù)連續(xù)運行參考站的支持下，依托互聯(lián)網(wǎng)通訊，在確保高精度的同時在大范圍內(nèi)提供實時定位服務(wù)的技術(shù)演化本文結(jié)合這一技術(shù)發(fā)展背景，全面研究了實時精密單點定位技術(shù)的原理及實現(xiàn)方法，研制了相應(yīng)的實驗軟件平臺，驗證了目前實時軌道鐘差產(chǎn)品的應(yīng)用效果在此基礎(chǔ)上，將實時精密單點定位技術(shù)應(yīng)用于近實時大氣可降水量反演和基于非差載波相位觀測量的VTEC計算，研究了相關(guān)的GPS數(shù)據(jù)處理方法，主要工作和結(jié)論總結(jié)如下： 1.應(yīng)用實時精密單點定位技術(shù)理論，研制了基于非差觀測量的實驗軟件平臺PositioningArtisan，實驗結(jié)果說明，該軟件能夠達(dá)到主流軟件的定位解算精度，除定位解算功能，該軟件還支持基于CNES實時鐘差的非差模糊度固定技術(shù)大氣可降水量反演和電離層VTEC計算功能 2.分析了應(yīng)用CNES實時鐘差軌道的單天解定位結(jié)果，該結(jié)果同采用IGS事后產(chǎn)品的定位結(jié)果精度相當(dāng)，驗證了CNES實時軌道鐘差已經(jīng)能夠支持實時靜態(tài)定位應(yīng)用的精度需求相關(guān)實驗結(jié)果說明，基于CNES整數(shù)鐘差產(chǎn)品的非差模糊度固定技術(shù)能夠顯著提高實時精密單點定位解算結(jié)果的收斂速度 3.研究了實時計算條件下的大氣可降水量反演數(shù)據(jù)處理方案，驗證了CNES實時軌道鐘差數(shù)據(jù)的精度能夠滿足支持實時大氣可降水量反演應(yīng)用需要提出了通過VMF1格網(wǎng)數(shù)據(jù)獲取地面氣象數(shù)據(jù)的方法通過與依賴地面直接氣象觀測的傳統(tǒng)方法的對比說明，VMF1格網(wǎng)數(shù)據(jù)能夠作為地面氣象信息的可靠來源 4.討論了缺乏直接氣象觀測數(shù)據(jù)條件下，實時大氣可降水量反演的數(shù)據(jù)處理方案提出了結(jié)合CNES實時軌道鐘差數(shù)據(jù)，不依賴直接氣象觀測的近實時大氣可降水量反演方法實驗結(jié)果說明，由于大氣可降水量反演應(yīng)用對于軌道鐘差數(shù)據(jù)誤差的敏感性減弱，GPT模型和VMF1預(yù)報格網(wǎng)數(shù)據(jù)都能夠作為地面氣象信息來源的有力補(bǔ)充該方法將能夠提高地基GPS氣象觀測部署的靈活性，進(jìn)一步發(fā)揮現(xiàn)有針對大地測量目的建設(shè)的GPS觀測站的應(yīng)用潛力 5.針對目前VTEC計算常用的載波平滑偽距觀測量觀測噪聲較大易受偽距觀測量中系統(tǒng)性誤差的影響且實時性不強(qiáng)的問題，提出了基于載波相位觀測量組成電離層觀測量的近實時VTEC計算方法在強(qiáng)電離層活動下的零（短）基線實驗結(jié)果表明，該方法能夠克服偽距觀測量的多路徑效應(yīng)及頻間偏差的不利影響獲得較高精度的VTEC計算結(jié)果，并通過使用廣播星歷提高計算結(jié)果的實時性
[Abstract]:In recent years, the technology of precise single-point positioning has gradually moved towards relying on Internet communication with the support of a few continuous operating reference stations. In order to ensure high precision and provide real-time positioning service on a large scale, this paper studies the principle and implementation method of real-time precise single point positioning technology, and develops the corresponding experimental software platform, combined with the development background of this technology. It is verified that the application effect of the real time orbit clock difference product at present is based on this, the real time precise single point positioning technology is applied to the near real time atmospheric precipitable water retrieval and the VTEC calculation based on the non differential carrier phase observation. The related GPS data processing methods are studied. The main work and conclusions are summarized as follows:. 1. Based on the theory of real time precise single point positioning, an experimental software platform PositioningArtisanbased on nondifferential observations is developed. The experimental results show that the software can achieve the accuracy of the main software, except for the function of the positioning solution. The software also supports the non-differential ambiguity fixed technology based on CNES real-time clock error. The retrieval of atmospheric precipitable water and the calculation of ionospheric VTEC are also supported. 2. The results of single day positioning using CNES real time clock difference orbit are analyzed. The accuracy of the result is similar to that of the one with IGS afterwards. The experimental results show that the CNES real-time orbit clock error can support the accuracy requirements of real-time static positioning applications. Non-difference ambiguity fixing technique based on CNES integer clock difference product can significantly improve the convergence speed of the solution of real-time precise single point positioning. 3. The inversion data processing scheme of atmospheric precipitable water under real-time calculation is studied. It is verified that the accuracy of CNES real-time orbit clock difference data can meet the needs of real-time atmospheric precipitable water retrieval. A method of obtaining surface meteorological data by VMF1 grid data is proposed. The comparison of traditional methods shows that VMF1 grid data can be used as a reliable source of surface meteorological information. 4. Under the condition of lack of direct meteorological observation data, the data processing scheme of real-time atmospheric precipitable water retrieval is discussed. Combined with CNES real time orbit clock difference data, The experimental results of near-real-time atmospheric precipitable water retrieval method independent of direct meteorological observations show that, The sensitivity of atmospheric precipitable water inversion to orbit clock error is weakened. Both GPT model and VMF1 forecast grid data can be used as a powerful source of surface meteorological information. This method can improve ground GPS meteorological information. Observation deployment flexibility, Further developing the Application potential of the existing GPS Observatory for Geodesy purposes. 5. Aiming at the problem that the observed noise of carrier smoothing pseudo-range observation used in VTEC calculation is large and easy to be affected by the systematic error in pseudo-range measurement, and the real-time performance is not strong. A near real time VTEC method based on carrier phase observations for ionospheric observations is proposed. The experimental results of zero (short) baselines under strong ionospheric activity show that, This method can overcome the multipath effect of pseudo-range observations and the adverse effects of inter-frequency deviation to obtain a high precision VTEC calculation result, and improve the real-time performance of the calculation results by using broadcast ephemeris.
【學(xué)位授予單位】：解放軍信息工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P228.4;P412.27

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相關(guān)期刊論文 前1條

1 張寶成;歐吉坤;袁運斌;鐘世明;;基于GPS雙頻原始觀測值的精密單點定位算法及應(yīng)用[J];測繪學(xué)報;2010年05期

本文編號：1503529