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首页> 外文学位 >Analysis of GPS data processing techniques: In search of optimized strategy of orbit and earth rotation parameter recovery.
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Analysis of GPS data processing techniques: In search of optimized strategy of orbit and earth rotation parameter recovery.

机译：GPS数据处理技术分析：寻找优化的轨道和地球旋转参数恢复策略。

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摘要

One of the two major problems addressed here is the application of the triple-difference technique in the Global Positioning System (GPS) orbit determination. It represents an innovative, high-standard, and optimal approach to the recovery of the GPS trajectory. The implementation of triple-difference requires special consideration of the correlation that is introduced into the data set via subsequent differencing, but it reduces significantly the number of parameters that need to be evaluated.; Another purpose of this research is GPS-based determination of rotational time and pole coordinates (Earth Rotation Parameters, ERPs), under different conditions such as different troposphere modeling, different nutation model, and variation of the ERP model itself. In particular, determination of diurnal and semidiurnal Universal Time (UT1) with satellite technique is discussed.; GPS, similar to other nonabsolute methods of ERP retrieval, suffers from an inherent defect in UT1 determination due to the collinearity between the variations in the right ascension of the satellite's orbital node and UT1. But GPS is sensitive to the change in UT1. Having the rate of UT1 resolved, one needs to connect it to the starting value of UT1-UTC based on an absolute and independent reference (for example, VLBI). GPS-derived ERPs are fairly stable and require VLBI-derived a priori values only once per month without any loss of accuracy.; The triple-difference technique, although not new as a concept of GPS data processing but certainly innovative in the field of orbit determination, has demonstrated remarkable processing capacity, flexibility, efficiency, and reliability. The validity and high precision of the triple-difference solution for GPS orbits and ERPs was confirmed by the consistency and repeatability tests for long baselines, showing the RMS ranging from a few parts in 10{dollar}{bsol}sp8{dollar} to a few parts in 10{dollar}{bsol}sp9{dollar} per coordinate.; Also, the short-periodic UT1 series derived from GPS shows good agreement with the VLBI-derived empirical model of Herring. Due to strong correlation between the long-periodic errors in the orbit and the daily retrograde polar motion, as well as the long-periodic nutation and the daily retrograde polar motion, it is currently impossible to separate the full spectrum of daily and subdaily signatures of polar motion from the satellite technique.
机译：此处解决的两个主要问题之一是三差技术在全球定位系统（GPS）轨道确定中的应用。它代表了一种创新的，高标准的，最优的GPS轨迹恢复方法。三重差分的实现需要特别考虑通过后续差分引入到数据集中的相关性，但是它大大减少了需要评估的参数数量。这项研究的另一个目的是在不同条件下（例如不同的对流层建模，不同的章动模型以及ERP模型本身的变化），基于GPS确定旋转时间和极坐标（地球旋转参数，ERP）。特别是，讨论了利用卫星技术确定世界日和半日世界时（UT1）。与其他非绝对ERP检索方法类似，由于卫星轨道节点和UT1的右上角变化之间的共线性，GPS在UT1确定中存在固有缺陷。但是GPS对UT1的变化很敏感。解决了UT1的速率后，需要根据绝对且独立的参考（例如VLBI）将其连接到UT1-UTC的起始值。 GPS衍生的ERP相当稳定，每月仅需要一次VLBI衍生的先验值，而不会损失任何准确性。三差技术虽然不是GPS数据处理的新概念，但在轨道确定领域无疑是创新的，它已经显示出了卓越的处理能力，灵活性，效率和可靠性。通过对长基线进行一致性和重复性测试，证实了GPS轨道和ERP的三差解决方案的有效性和高精度，表明RMS范围从10 {dollar} {bsol} sp8 {dollar}每个坐标中10 {dollar} {bsol} sp9 {dollar}中的部分。此外，从GPS导出的短周期UT1系列与VLBI衍生的鲱鱼经验模型显示出良好的一致性。由于轨道的长周期误差与每日逆行极动之间的强烈相关性，以及长周期章动和每日逆行极动之间的强烈相关性，目前无法分离出所有的每日和次日签名的频谱。来自卫星技术的极地运动。

著录项

  • 作者

    Grejner-Brzezinska, Dorota Alicja.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Geodesy.; Geophysics.; Engineering Aerospace.
  • 学位 Ph.D.
  • 年度 1995
  • 页码 p.6623
  • 总页数 234
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大地测量学;
  • 关键词

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