GNSS整周模糊度实时解算方法研究

发布时间：2018-05-29 19:09

本文选题：OTF + 整周模糊度　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：在GNSS定位中，整周模糊度的解算是实现精密定位的关键，快速准确的求解整周模糊度对定位精度，缩短定位时间都有重大的意义。本文针对双差观测方程的组成进行介绍，并对其线性化方程进行研究。同时也研究了双差模糊度解算的原理、模型和算法。研究几种快速解算模糊度的方法，，提出一种单历元的双差模糊度解算方法，最后通过实验进行分析和验证。本文的研究工作主要有以下几个方面： 1．介绍GNSS定位的相关理论，包括GNSS载波相位和伪距观测值及其观测方程；GNSS单差、双差观测值的组合；GNSS定位观测方程的线性化；GNSS观测值之间的各种常用组合。 2．研究OTF解算的基本原理，详细介绍了解算整周模糊度的模型算法，深入研究了整数最小二乘模糊度降相关平差法，即LAMBDA方法。 3．研究两种整周模糊度实时快速/单历元解算方法，提出一种新的单历元整周模糊度解算方法。首先解算宽巷模糊度，然后固定L1/L2整周模糊度模糊度。结合宽巷整周模糊度的两步搜索法，可准确确定宽巷模糊度。然后利用无电离层组合观测值单历元解算出L1载波相位模糊度。 4．对本文提出的算法进行程序实现，采用实测实验数据对算法的可行性进行了验证。
[Abstract]:In GNSS positioning, the solution of integer ambiguity is the key to realize precision positioning. It is of great significance to solve the ambiguity of whole cycle quickly and accurately to the positioning accuracy and shorten the positioning time. In this paper, the composition of double difference observation equation is introduced, and its linearization equation is studied. At the same time, the principle, model and algorithm of double difference ambiguity resolution are also studied. In this paper, several methods of fast ambiguity resolution are studied, and a double difference ambiguity resolution method of single epoch is proposed. Finally, the method is analyzed and verified by experiments. The research work of this paper mainly includes the following aspects: 1. This paper introduces the relevant theories of GNSS positioning, including the carrier phase and pseudo-range observations of GNSS and their observation equations, such as the single difference of GNSS, the combination of double difference observations and the linearization of the observation equations of GNSS positioning, and the commonly used combinations between the observed values of GNSS carrier phase and pseudo-range. 2. In this paper, the basic principle of OTF solution is studied, the model algorithm of integer ambiguity is introduced in detail, and the integer least squares correlation adjustment method, I. e., LAMBDA method, is studied in depth. 3. In this paper, two real time fast / single epoch methods for integer ambiguity resolution are studied, and a new method for integer cycle ambiguity resolution of single epoch is proposed. First, the ambiguity of wide lane is solved, then the ambiguity of whole cycle of L1/L2 is fixed. The ambiguity degree of wide lane can be accurately determined by two step search method combined with the whole cycle ambiguity of wide roadway. Then the L1 carrier phase ambiguity is calculated by using the single epoch of ionospheric combined observations. 4. The feasibility of the algorithm is verified by the experimental data.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P228.4

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