本文關(guān)鍵詞： GNSS IGS數(shù)據(jù) 廣播星歷 精密星歷 ITRF框架 精度分析　出處：《東南大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著GNSS的發(fā)展,國(guó)際GNSS服務(wù)(IGS)也在與時(shí)俱進(jìn)。從1994年開(kāi)始,IGS便向全球范圍內(nèi)的研究機(jī)構(gòu)和個(gè)人提供高質(zhì)量的數(shù)據(jù)和產(chǎn)品服務(wù),用于支持各種科學(xué)研究、教育服務(wù)以及多學(xué)科的綜合應(yīng)用等方面。目前,在全球范圍內(nèi),已經(jīng)有許多研究機(jī)構(gòu)和GNSS個(gè)體用戶(hù)利用IGS發(fā)布的數(shù)據(jù)和產(chǎn)品來(lái)進(jìn)行科學(xué)研究和精密定位。本文首先介紹了精密單點(diǎn)定位的數(shù)學(xué)模型和主要誤差來(lái)源,然后介紹了 IGS發(fā)布的數(shù)據(jù)和產(chǎn)品的使用及研究現(xiàn)狀,概述了 IGS服務(wù)機(jī)構(gòu)的由來(lái)、發(fā)展和運(yùn)行機(jī)制,系統(tǒng)地對(duì)IGS數(shù)據(jù)中心的各類(lèi)數(shù)據(jù)和產(chǎn)品進(jìn)行了說(shuō)明,最后編制軟件實(shí)現(xiàn)對(duì)IGS數(shù)據(jù)的智能獲取,并且對(duì)獲取的數(shù)據(jù)進(jìn)行深入的處理和分析。具體的研究?jī)?nèi)容和結(jié)果如下:(1)完成IGS服務(wù)數(shù)據(jù)智能獲取軟件開(kāi)發(fā)。在對(duì)IGS發(fā)布的數(shù)據(jù)和產(chǎn)品進(jìn)行分析與了解的基礎(chǔ)上,依據(jù)面向?qū)ο蠓治雠c設(shè)計(jì)的思維,結(jié)合模塊化的程序思想,基于VS2013平臺(tái),采用C++編程語(yǔ)言,設(shè)計(jì)開(kāi)發(fā)MFC應(yīng)用程序,實(shí)現(xiàn)對(duì)IGS服務(wù)數(shù)據(jù)的智能獲取軟件的開(kāi)發(fā),并且建立相應(yīng)的數(shù)據(jù)庫(kù),滿(mǎn)足數(shù)據(jù)的存儲(chǔ)和管理功能。(2)利用數(shù)理統(tǒng)計(jì)方法,分析廣播星歷所能達(dá)到的精度指標(biāo)。結(jié)果表明:GPSBlock-IIF衛(wèi)星和Block-IIRM衛(wèi)星的軌道精度相當(dāng)且都明顯優(yōu)于Block-IIR衛(wèi)星;三種型號(hào)衛(wèi)星上搭載的衛(wèi)星鐘,其鐘差精度也基本相當(dāng),整體精度優(yōu)于6ns,但在短期穩(wěn)定性能上,銣鐘比銫鐘更優(yōu)。(3)建立IGU精密實(shí)時(shí)軌道數(shù)據(jù)預(yù)推誤差模型,得到預(yù)推時(shí)間與預(yù)推軌道誤差值的近似函數(shù)關(guān)系式。針對(duì)IGS不同分析中心衛(wèi)星軌道產(chǎn)品之間的差異,采用七參數(shù)轉(zhuǎn)換模型計(jì)算不同分析中心坐標(biāo)轉(zhuǎn)換的參數(shù),消除產(chǎn)品間的系統(tǒng)性偏差,比較分析不同分析中心產(chǎn)品的精度,結(jié)果表明:ESA、GFZ產(chǎn)品的精度較好,可以自行綜合ESA、GFZ數(shù)據(jù)產(chǎn)品來(lái)替代IGS發(fā)布的最終數(shù)據(jù)產(chǎn)品。(4)將IGS服務(wù)數(shù)據(jù)和產(chǎn)品用于精密單點(diǎn)定位,分析不同衛(wèi)星系統(tǒng)的數(shù)據(jù)對(duì)精密單點(diǎn)定位精度的影響以及不同分析中心的數(shù)據(jù)和產(chǎn)品對(duì)精密單點(diǎn)定位精度的影響。通過(guò)ITRF框架轉(zhuǎn)換算例來(lái)驗(yàn)證框架轉(zhuǎn)換的可行性。
[Abstract]:With the development of GNSS, the international GNSS service is also advancing with the times. IGS provides high-quality data and product services to research institutions and individuals around the world to support a variety of scientific research, educational services and multidisciplinary applications. On a global scale. There have been many research institutions and individual GNSS users using the data and products released by IGS to carry out scientific research and precise positioning. Firstly, this paper introduces the mathematical model and main error sources of precise single point positioning. Then it introduces the use and research status of data and products released by IGS, and summarizes the origin, development and operation mechanism of IGS service organization. All kinds of data and products of IGS data center are explained systematically. Finally, the software is developed to realize the intelligent acquisition of IGS data. And the obtained data in-depth processing and analysis. Specific research content and results are as follows: 1). To complete the development of IGS service data intelligent acquisition software. On the basis of the analysis and understanding of the data and products released by IGS. According to the thinking of object-oriented analysis and design, combined with modular program idea, based on VS2013 platform, C programming language is used to design and develop MFC application program. To realize the development of intelligent acquisition software for IGS service data, and to establish the corresponding database to meet the data storage and management function. The accuracy index of broadcast ephemeris is analyzed. The results show that:. The orbit accuracy of GPSBlock-IIF satellite and Block-IIRM satellite is the same and obviously superior to that of Block-IIR satellite. The clock on the three types of satellites is similar in accuracy, the overall accuracy is better than 6ns, but in the short-term stability performance. Rubidium clock is better than cesium clock.) the IGU precision real-time orbit data prepush error model is established. The approximate functional relationship between the pre-push time and the error value of the pre-push orbit is obtained. The differences between the central satellite orbit products and the IGS are analyzed. The seven parameter transformation model is used to calculate the parameters of coordinate transformation between different analytical centers, to eliminate the systematic deviation between products, and to compare and analyze the accuracy of different analysis centers. The results show that the results are as follows: (1) ESA. The precision of GFZ products is good, we can use IGS service data and products for precise single point positioning instead of final data products released by IGS. The influence of data from different satellite systems on precision single point positioning accuracy and the influence of data and products from different analysis centers on precision single point positioning accuracy are analyzed. An example of ITRF frame conversion is used to verify the accuracy of frame conversion. Feasibility.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P228.4

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