低轨卫星增强载波相位差分定位

发布时间：2018-06-28 01:14

本文选题：全球定位系统 + 铱星系统　；参考：《测绘科学》2017年10期

【摘要】：针对低轨卫星快速空间几何变化和抗干扰能力强等特征,该文基于卫星工具包软件对全球导航定位系统和铱星系统星座进行了仿真,并假定铱星具有导航卫星的功能,分析铱星对GPS定位的增强作用。首先对GPS和铱星增强星座的可见卫星数量和几何精度因子值进行了分析,然后通过对不同的误差值建模,对GPS系统和铱星系统的观测值进行了仿真,分析了低轨卫星对双差定位浮点解和模糊度固定的增强作用,结果表明:低轨卫星的加入增加了可见卫星数量,几何精度因子也优于单GPS系统。单频双差模糊度浮点解的RMS值优于1周,双频双差模糊度浮点解的RMS值优于0.5周,与单GPS相比有了较明显的提高,同时,低轨卫星的加入更有利于单频短基线的模糊度固定。
[Abstract]:Based on the satellite toolkit software, the global navigation and positioning system and iridium system constellation are simulated based on the satellite toolkit software, and the iridium satellite has the function of navigation satellite, and the enhancement of the iridium satellite to the GPS positioning is analyzed. First, the visible satellite of the GPS and iridium enhancement constellations is presented. The number of stars and the value of the geometric precision factor are analyzed. Then by modeling different error values, the observation values of the GPS system and iridium system are simulated, and the enhancement effect of the low orbit satellite on the fixed floating point solution and the ambiguity of the double difference positioning is analyzed. The results show that the addition of the low orbit satellite increases the number of visible satellites and the geometric accuracy. The factor is also superior to the single GPS system. The RMS value of the single frequency and double difference ambiguity floating-point solution is better than 1 weeks, the RMS value of the double frequency double difference ambiguity floating point solution is better than 0.5 weeks, and it has a more obvious improvement than the single GPS. At the same time, the addition of the low orbit satellite is more beneficial to the ambiguity of the single frequency short baseline.
【作者单位】：中国测绘科学研究院;国家测绘地理信息局卫星测绘应用中心;中国科学院测量与地球物理研究所;
【基金】：国家自然科学基金项目(41274018) 科技部基础专项(2015FY310200) 中国测绘科学研究院基本业务费项目(7771509)
【分类号】：P228.4

【相似文献】