基于超短基线的双频整周模糊度单历元取整固定算法

发布时间：2018-03-03 15:21

本文选题：整周模糊度　切入点：超短基线　出处：《北京理工大学学报》2017年05期 　论文类型：期刊论文

【摘要】：针对使用伪距取整固定宽巷整周模糊度效率高,但是宽巷一周取整错误发生频繁,伪距误差较大时还会出现大于一周的取整错误的问题,设计了一种可以弥补宽巷取整错误的整周模糊度固定算法.通过宽巷分离出的L_1浮点解小数探测和修复宽巷一周取整错误,使用RAIM算法排除大于一周的宽巷取整错误,最后使用正确的整周模糊度固定全部整周模糊度,完成高精度定位.使用实际GPS超短基线数据比较该算法与单历元LAMBDA算法的性能.该算法提高了直接使用伪距取整宽巷整周模糊度的固定率.相比单历元LAMBDA算法,本文算法的固定率稍低,但计算效率有明显提升.
[Abstract]:In view of the high efficiency of integer ambiguity in fixed wide roadway with pseudo-range, but the error occurs frequently in one week of wide roadway, when the error of pseudo-range is larger than one week, the problem of integer error is more than one week. This paper designs a fixed integer ambiguity algorithm which can make up for the wide lane rounding error. By detecting and repairing the one-week rounding error of the wide roadway by using the L1-floating-point solution decimal number separated from the wide roadway, the RAIM algorithm is used to eliminate the wide roadway rounding error which is larger than one week. Finally, the correct integer ambiguity is used to fix the whole whole cycle ambiguity. The performance of the algorithm is compared with that of the single epoch LAMBDA algorithm using the actual GPS ultrashort baseline data. The algorithm improves the fixed rate of directly using pseudo-range to get the integer ambiguity of the wide lane. Compared with the single-epoch LAMBDA algorithm, The fixed rate of this algorithm is slightly lower, but the computational efficiency is obviously improved.
【作者单位】：北京理工大学信息与电子学院;北京理工大学卫星导航电子信息技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(61101128)
【分类号】：P228.4

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