發(fā)布時(shí)間：2018-01-28 22:03

  本文關(guān)鍵詞： 北斗衛(wèi)星導(dǎo)航系統(tǒng) 實(shí)測(cè)數(shù)據(jù) 精度因子 選星組合 性能指標(biāo)　出處：《中國民航大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：衛(wèi)星系統(tǒng)性能監(jiān)測(cè)與評(píng)估是系統(tǒng)發(fā)展建設(shè)必不可少的步驟。中國實(shí)施北斗衛(wèi)星導(dǎo)航系統(tǒng)“三步走”戰(zhàn)略,通過星座設(shè)計(jì)、空間信號(hào)質(zhì)量及服務(wù)性能指標(biāo)建設(shè)來實(shí)現(xiàn)各階段平穩(wěn)過渡。以實(shí)測(cè)數(shù)據(jù)為基礎(chǔ)分析北斗系統(tǒng)性能參數(shù)對(duì)現(xiàn)階段的區(qū)域系統(tǒng)和將來面向全球化覆蓋系統(tǒng)建設(shè)具有現(xiàn)實(shí)的指導(dǎo)意義。基于實(shí)測(cè)數(shù)據(jù)對(duì)一周內(nèi)各衛(wèi)星可見性進(jìn)行統(tǒng)計(jì)和對(duì)比分析,研究了可見性較差的衛(wèi)星的規(guī)律。為北斗單星服務(wù)性能評(píng)估提供依據(jù)。對(duì)比北斗系統(tǒng)與GPS在連續(xù)一周內(nèi)水平定位精度和垂直定位精度。不僅對(duì)北斗系統(tǒng)定位質(zhì)量有了長期數(shù)據(jù)統(tǒng)計(jì)的研究同時(shí)通過與GPS的對(duì)比,反映出北斗系統(tǒng)在定位精度以及精度穩(wěn)定性上的不足,對(duì)北斗系統(tǒng)后續(xù)建設(shè)與系統(tǒng)升級(jí)提供改進(jìn)方向上的參考。在分析總結(jié)了各種精度因子模型后,基于連續(xù)一周實(shí)測(cè)數(shù)據(jù)對(duì)北斗系統(tǒng)與GPS精度因子進(jìn)行對(duì)比研究。同時(shí)證明北斗系統(tǒng)精度因子達(dá)到甚至優(yōu)于北斗性能規(guī)范中可用性指標(biāo)。在研究GDOP特性基礎(chǔ)上基于GDOP進(jìn)行最優(yōu)選星組合,提出采用進(jìn)入最優(yōu)選星組合次數(shù)來評(píng)價(jià)單星區(qū)域?qū)Ш蕉ㄎ毁|(zhì)量。基于GDOP門限值提出次優(yōu)選星組合,為用戶終端定位提供備用選星,提升服務(wù)連續(xù)性。在已知衛(wèi)星相對(duì)于接收機(jī)的仰角、方位角及軌道高度情況下,提出利用遷移算法得出衛(wèi)星相對(duì)于任意地點(diǎn)的仰角和方位角,從而解得特定衛(wèi)星組合在任意地點(diǎn)的GDOP值。基于該算法,理論上可進(jìn)行較大區(qū)域內(nèi)的GDOP值分布分析。對(duì)比了廣播星歷與精密星歷差值,反映出廣播星歷準(zhǔn)確性。研究了北斗系統(tǒng)目前已有的信號(hào)層及服務(wù)層連續(xù)性及部分可用性指標(biāo),基于長期實(shí)測(cè)數(shù)據(jù)進(jìn)行指標(biāo)驗(yàn)證。
[Abstract]:Performance monitoring and evaluation of satellite systems is an essential step in system development and construction. China has implemented the "three-step" strategy of Beidou satellite navigation system through constellation design. The performance parameters of Beidou system are analyzed based on the measured data, which are helpful to the construction of the regional system and the globalization-oriented coverage system in the future. Based on the measured data, the visibility of each satellite within a week is statistically analyzed and compared. The regularity of satellite with poor visibility is studied, which provides the basis for evaluating the service performance of Beidou single satellite. The horizontal and vertical positioning accuracy of Beidou system and GPS are compared within a continuous week. Not only the positioning accuracy of Beidou system is not only for Beidou system. The quality of the long-term data with statistical research was also compared with GPS. It reflects the lack of positioning accuracy and accuracy stability of Beidou system, and provides a reference for the further construction and upgrade of Beidou system. After analyzing and summing up various precision factor models. The accuracy factor of Beidou system is compared with that of GPS based on the measured data for one consecutive week. It is also proved that the accuracy factor of Beidou system reaches or is superior to the usability index of Beidou performance specification. Based on GDOP, the optimal combination of star selection is carried out. This paper proposes to use the optimal number of star selection to evaluate the quality of single-star regional navigation and positioning. Based on the GDOP threshold, the sub-optimal combination is proposed to provide backup satellite selection for user terminal positioning. When the elevation azimuth and orbital altitude of the satellite relative to the receiver are known a migration algorithm is proposed to obtain the elevation and azimuth of the satellite relative to any location. Based on this algorithm, the distribution of GDOP values in large regions can be analyzed theoretically, and the difference between broadcast ephemeris and precise ephemeris is compared. Reflecting the accuracy of broadcast ephemeris, the continuity and partial availability indexes of signal layer and service layer in Beidou system are studied, and the indexes are verified based on long-term measured data.
【學(xué)位授予單位】：中國民航大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN967.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 田安紅;付承彪;;GPS與DTMB組合導(dǎo)航精度因子研究[J];電視技術(shù);2014年07期

2 吳軍;常江;姜勇;;GEO和IGSO衛(wèi)星增強(qiáng)GPS性能的仿真分析[J];計(jì)算機(jī)工程與應(yīng)用;2012年09期

3 甘興利;袁贛南;;GPS/SPL組合偽距測(cè)量的精度因子仿真研究[J];系統(tǒng)仿真學(xué)報(bào);2008年18期

4 侯洪濤;周鴻偉;張洪;李群;;基于SMP2.0的全球?qū)Ш较到y(tǒng)精度因子的仿真分析[J];系統(tǒng)仿真學(xué)報(bào);2010年06期

5 黃繼拯;劉紅;趙艷;李轅;;GPS/北斗的組合選星算法研究[J];艦船電子工程;2011年08期

6 ;[J];;年期

相關(guān)會(huì)議論文 前1條

1 劉瓊;岳昊;吳北平;;MATLAB在GPS衛(wèi)星幾何分布計(jì)算中的應(yīng)用[A];全國測(cè)繪科技信息網(wǎng)中南分網(wǎng)第二十四次學(xué)術(shù)信息交流會(huì)論文集[C];2010年

相關(guān)碩士學(xué)位論文 前2條

1 趙銘;北斗導(dǎo)航衛(wèi)星系統(tǒng)定位性能與參數(shù)分析[D];中國民航大學(xué);2014年

2 鄧盈;多功能GPS導(dǎo)航記錄系統(tǒng)的研制[D];北京郵電大學(xué);2009年

，

本文編號(hào)：1471668