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New algorithm for on-the-fly ambiguity resolution of real-time differential GPS positioning.

机译:实时差分GPS定位的即时模糊度求解新算法。

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摘要

This research is mainly focused on a new algorithm proposed to address the on-the-fly ambiguity resolution problem in real-time differential GPS positioning. The new algorithm consists of an “intermediate ambiguity search strategy (IASS)” and an “estimator bank” with a search window as a bridge between both components (i.e. IASS and the estimator bank). Based on the proposed (new) algorithm, the program, “Real Time Positioning (RTP)”, was developed using MATLAB. As compared with existing methods, the advantages of the proposed algorithm include simplicity, robustness, and versatility.; Three GPS experiments (i.e. one static and two kinematic cases—buoy and aircraft) were used to evaluate the capability of the proposed algorithm. And, to confirm the validation of the proposed algorithm, results from MSODP (Multi Satellite Orbit Determination Program), a tide gauge, and KARS (Kinematic And Rapid Static) code were adopted as the reference values. The test results of these three cases indicate that the magnitudes of average differences (between the RTP solution and the reference values) are less than 1.9 cm and the corresponding standard deviations are less than 1.3 cm in the three components (X,Y,Z) of the ECEF (Earth-Centered Earth-Fixed) coordinate system and in the vertical direction of the local geodetic coordinate system. In addition, the average processing time (from the input of the RINEX and navigation files to position estimates) is less than or equal to 0.627 seconds for each epoch during the confirmation period as the data were collected at a rate of 1 Hz, which allows the proposed algorithm to meet a requirement for high accuracy, real-time positioning.
机译:这项研究主要集中在一种新算法上,该算法旨在解决实时差分GPS定位中的动态模糊度解决问题。新算法由“中间歧义搜索策略(IASS)”和“估计器库”组成,而“搜索器库”具有搜索窗口作为两个组件(即IASS和估计器库)之间的桥梁。基于提出的(新)算法,使用MATLAB开发了“实时定位(RTP)”程序。与现有方法相比,所提出的算法的优点包括简单性,鲁棒性和通用性。使用三个GPS实验(即一个静态案例和两个运动案例-浮标和飞机)来评估该算法的能力。并且,为了确认所提出算法的有效性,采用了MSODP(多卫星轨道确定程序),潮汐计和KARS(运动和快速静态)代码的结果作为参考值。这三种情况的测试结果表明,三个分量(X,Y,Z)的平均差异(RTP溶液和参考值之间)的大小小于1.9 cm,相应的标准偏差小于1.3 cm。 ECEF(以地球为中心的地球固定)坐标系的坐标以及局部大地坐标系的垂直方向的坐标。此外,在确认期间,由于以1 Hz的速率收集数据,每个时期的平均处理时间(从RINEX和导航文件的输入到位置估计)小于或等于0.627秒。提出的算法可以满足高精度,实时定位的要求。

著录项

  • 作者

    Mao, Jen-Hao.;

  • 作者单位

    The University of Texas at Austin.;

  • 授予单位 The University of Texas at Austin.;
  • 学科 Engineering Aerospace.; Remote Sensing.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 188 p.
  • 总页数 188
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;遥感技术;
  • 关键词

  • 入库时间 2022-08-17 11:47:47

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