【摘要】：GPS長基線數(shù)據(jù)處理軟件是一個(gè)非常復(fù)雜的系統(tǒng),CGO作為一款高精度的GPS數(shù)據(jù)處理軟件,簡化了高精度GPS數(shù)據(jù)處理的繁瑣過程,但是系統(tǒng)在集成初期仍遺留一些問題。本文在研究GPS高精度數(shù)據(jù)處理理論的基礎(chǔ)上,針對(duì)CGO基線數(shù)據(jù)處理軟件進(jìn)行部分集成優(yōu)化,包括：模糊度固定率,基線解算精度,平差功能,運(yùn)算速度,輔助功能模塊等。在分析原CGO系統(tǒng)平臺(tái)的基礎(chǔ)上,提出一套優(yōu)化解決方案,研究的主要內(nèi)容和成果包括以下幾個(gè)方面： 1：在集成之初的平臺(tái)上,開發(fā)出幾類平差模塊,具體包括三維無約束平差、三維約束平差、二維約束平差,如今的平臺(tái)集基線處理與網(wǎng)平差功能于一體。 2：設(shè)計(jì)了豐富的輔助功能模塊,降低了高精度GPS數(shù)據(jù)處理軟件的復(fù)雜性,例如坐標(biāo)轉(zhuǎn)換,時(shí)間轉(zhuǎn)換,數(shù)據(jù)預(yù)處理,天線自動(dòng)糾錯(cuò),Google地圖以及效果更好的可視化界面。 3：通過幾套對(duì)比測(cè)試方案進(jìn)行了系統(tǒng)性能優(yōu)化測(cè)試,具體包括短基線、中長基線、長基線、帶狀混合網(wǎng)四個(gè)具有一定代表性的實(shí)驗(yàn),將CGO得到的基線處理結(jié)果與GAM IT比較,將CGO約束平差得到的結(jié)果與COSA_GPS比較。 4：對(duì)影響精密定位的實(shí)驗(yàn)因子進(jìn)行分析研究,本文主要研究了星歷精度對(duì)基線解算的影響,通過實(shí)驗(yàn)發(fā)現(xiàn)目前的快速精密星歷在非特殊要求的情況下完全可以替代精密星歷；研究天線PCV值對(duì)定位的影響,通過實(shí)驗(yàn)發(fā)現(xiàn)天線PCV對(duì)長基線解算影響較大,對(duì)中短基線的影響較之于長基線小,當(dāng)使用同種天線且為中短基線基本可以忽略接收機(jī)天線PCV值對(duì)基線解算的影響；研究截止高度角對(duì)基線解算的影響,發(fā)現(xiàn)10。高度角得到的定位結(jié)果優(yōu)于5。與25。；研究不同觀測(cè)時(shí)間對(duì)定位結(jié)果的影響,通過實(shí)驗(yàn)發(fā)現(xiàn)當(dāng)觀測(cè)時(shí)間達(dá)到10小時(shí),定位精度基本趨向穩(wěn)定,再延長觀測(cè)時(shí)間對(duì)提高定位精度作用不大；研究不同觀測(cè)時(shí)段對(duì)定位結(jié)果的影響,發(fā)現(xiàn)觀測(cè)時(shí)間處于晚上的定位精度略好于白天；研究采樣率對(duì)定位結(jié)果的影響,發(fā)現(xiàn)采樣率為30s和60s得到的定位結(jié)果基本一致。
[Abstract]:GPS long baseline data processing software is a very complex system. As a high-precision GPS data processing software, CGO simplifies the tedious process of high-precision GPS data processing, but it still leaves some problems in the early stage of system integration. Based on the research of GPS high precision data processing theory, this paper makes partial integration optimization for CGO baseline data processing software, including: fixed ambiguity rate, baseline resolution accuracy, adjustment function, operation speed, auxiliary function module and so on. Based on the analysis of the original CGO system platform, a set of optimization solution is put forward. The main contents and results of the research include the following aspects: 1. On the platform of the beginning of integration, several kinds of adjustment modules are developed. It includes three dimensional unconstrained adjustment, three dimensional constraint adjustment and two dimensional constraint adjustment. Now the platform integrates the function of baseline processing and network adjustment. 2. Abundant auxiliary function modules are designed to reduce the complexity of high-precision GPS data processing software, such as coordinate conversion, time conversion, data preprocessing, antenna automatic error correction, Google map and better visual interface. 3: the system performance optimization test is carried out through several contrast test schemes, including four typical experiments, including short baseline, medium and long baseline, and banded hybrid network. The results of baseline processing obtained by CGO are compared with those of GAM IT. The results obtained by CGO constraint adjustment are compared with those obtained by COSA_GPS. 4: the experimental factors that affect precision positioning are analyzed. In this paper, the influence of ephemeris precision on baseline solution is studied. It is found that the current rapid precision ephemeris can replace the precise ephemeris without special requirements. The effect of antenna PCV value on positioning is studied. It is found that antenna PCV has a greater influence on the solution of long baseline, and has less effect on medium and short baseline than on long baseline. The influence of receiver antenna PCV value on the baseline solution can be ignored when the same antenna is used and is a medium and short baseline. The effect of cutoff height angle on baseline solution is studied, and it is found that 10. 5%. The result of height angle is better than that of 5. The experimental results show that when the observation time reaches 10 hours, the positioning accuracy tends to be stable, and the extension of observation time has little effect on the improvement of positioning accuracy. By studying the effect of different observation periods on the positioning results, it is found that the positioning accuracy of the observation time is slightly better than that of the daytime, and the sampling rate has the same effect on the positioning results, and the results obtained at the sampling rates of 30s and 60s are basically the same.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P228.4

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