本文選題：差分GPS　切入點(diǎn)：滑坡監(jiān)測(cè)系統(tǒng)　出處：《南京理工大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：在滑坡監(jiān)測(cè)系統(tǒng)的研究領(lǐng)域中,由于差分GPS技術(shù)的發(fā)展,使得GPS的定位精度相比其它方法更勝一籌,具有廣泛的應(yīng)用前景,從而成為滑坡監(jiān)測(cè)技術(shù)研究的熱點(diǎn)。本文主要研究了基于差分GPS的滑坡監(jiān)測(cè)技術(shù),論文的主要研究?jī)?nèi)容和研究成果如下所示： (1)提出本文的滑坡監(jiān)測(cè)系統(tǒng)是基于差分GPS算法建立的,并分析并整理了GPS定位中的誤差來(lái)源。主要對(duì)滑坡監(jiān)測(cè)系統(tǒng)中的GPS衛(wèi)星瞬時(shí)坐標(biāo)計(jì)算進(jìn)行了算法分析與程序?qū)崿F(xiàn),與精密星歷提供的精密坐標(biāo)進(jìn)行對(duì)比,評(píng)價(jià)坐標(biāo)解算的精度。并對(duì)各坐標(biāo)系的相互轉(zhuǎn)換、單點(diǎn)定位等問(wèn)題進(jìn)行理論分析與實(shí)驗(yàn)論證,進(jìn)行精度分析。 (2)對(duì)差分算法中精度最高的載波相位差分算法的觀測(cè)模型及其差分改正數(shù)生成的過(guò)程進(jìn)行理論研究,并對(duì)載波相位差分算法中最關(guān)鍵的整周模糊度的計(jì)算方法進(jìn)行了研究。 (3)確定了滑坡監(jiān)測(cè)系統(tǒng)的組成與硬件設(shè)備并進(jìn)行實(shí)驗(yàn)分析,對(duì)監(jiān)測(cè)數(shù)據(jù)進(jìn)行處理得到載波相位差分曲線隨歷元間隔不同的變化,以此可以確定整周模糊度解算的歷元間隔的范圍,并利用確定模糊度之后的載波相位差分曲線進(jìn)行誤差分析。 (4)進(jìn)行載波相位差分實(shí)驗(yàn)時(shí),分析了不同的衛(wèi)星選擇對(duì)于載波相位差分基線解算結(jié)果的影響。在選星問(wèn)題上提出選擇的衛(wèi)星之間必須有一定的高度角差值,且單顆衛(wèi)星的高度角在整個(gè)觀測(cè)時(shí)間內(nèi)不能出現(xiàn)持續(xù)快速的變化,這都會(huì)影響基線解算的精度,在監(jiān)測(cè)過(guò)程中一旦出現(xiàn)衛(wèi)星失鎖必須重新解算模糊度。
[Abstract]:In the research field of landslide monitoring system, because of the development of differential GPS technology, the positioning accuracy of GPS is better than that of other methods. In this paper, the landslide monitoring technology based on differential GPS is mainly studied. The main research contents and research results are as follows:. 1) it is proposed that the landslide monitoring system in this paper is based on the differential GPS algorithm, and the error sources in the GPS positioning are analyzed and sorted out. The calculation of the instantaneous coordinates of the GPS satellite in the landslide monitoring system is mainly analyzed and programmed. Compared with the precise coordinates provided by the precise ephemeris, the precision of coordinate solution is evaluated, and the theoretical analysis and experimental demonstration of the problems of coordinate system transformation and single point positioning are carried out, and the accuracy analysis is carried out. In this paper, the observation model of carrier phase difference algorithm with the highest precision and the process of generating differential correction are studied theoretically, and the calculation method of integer ambiguity, which is the most important part of carrier phase difference algorithm, is studied. The composition and hardware equipment of the landslide monitoring system are determined and the experimental analysis is carried out. The carrier phase difference curve is obtained by processing the monitoring data, and the variation of the carrier phase difference curve with the interval of each epoch is obtained. In this way, the range of epoch interval of integer ambiguity resolution can be determined, and the error analysis is carried out by using carrier phase difference curve after ambiguity determination. In the experiment of carrier phase difference, the influence of different satellite selection on the results of baseline solution of carrier phase difference is analyzed. In the problem of star selection, there must be a certain height angle difference between the selected satellites. Moreover, the altitude angle of a single satellite cannot change continuously and rapidly in the whole observation time, which will affect the accuracy of the baseline calculation. Once the satellite loses its lock in the monitoring process, the ambiguity must be solved again.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：P228.4;P642.22

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