南水北调中线GPS精密控制网复测的研究

发布时间：2018-03-03 13:06

本文选题：GPS　切入点：网质量　出处：《西安科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：南水北调中线工程可缓解京、津、华北地区水资源危机，大大改善供水区生态、环境和投资环境，推动我国中部地区的经济发展。南水北调中线工程是一项长期而艰巨的工程，由于受外界环境的影响，可能会造成控制点的位移或者丢失，为确保工程质量，在施工中结合实际情况对原有控制网进行复测并优化设计，以检验原有控制点坐标是否正确，以及控制网是否合理。本文利用HC市GPS网数据，通过对比分析GPS基线的质量、常规地面观测值的质量、起算数据的精度、数量和分布、GPS网的结构以及数据处理方法的完备性对GPS网质量的影响。研究了GPS网优化设计的一些要求和内容。得出如下结论：（1）GPS网的基本元素是GPS基线向量，基线向量的质量的好坏决定了GPS网的质量。在测量和数据处理中，必须采取一定的相应的质量控制措施，，以确保其GPS基线能满足项目的要求。（2）起算点尽量分布在控制网区域范围内，起算点3-4个最佳，符合测量规范，精度能保证，工作量最小，费用低。（3）对于一个特定的网来说，观测值（包括GPS基线向量和常规地面观测值）的数量越多，网的整体质量越高。（4）由于采用数学模型的不同以及数据处理的算法的不太一样，由不同的数据处理软件所处理的结果并不一样。
[Abstract]:The South-to-North Water transfer Project can alleviate the water crisis in Beijing, Tianjin and North China, greatly improve the ecological, environmental and investment environment in the water supply areas, and promote economic development in the central region of China. The South-to-North Water transfer Middle Route Project is a long-term and arduous project. Due to the influence of the external environment, the displacement or loss of the control point may be caused. In order to ensure the quality of the project, the original control network is re-tested and optimized to check whether the coordinates of the original control point are correct or not in combination with the actual situation in the construction. And whether the control network is reasonable. In this paper, using HC GPS net data, the quality of GPS baseline, the quality of conventional ground observations and the accuracy of starting data are compared and analyzed. The influence of the quantity and distribution of GPS network structure and the completeness of data processing method on the quality of GPS net is studied. Some requirements and contents of GPS net optimization design are studied. The conclusions are as follows:. The basic element of the GPS network is the GPS baseline vector, the quality of the baseline vector determines the quality of the GPS net. In the measurement and data processing, certain quality control measures must be taken to ensure that the GPS baseline can meet the requirements of the project. The starting points are distributed in the control network area as far as possible, and the starting points are 3-4 best, which accord with the standard of measurement, the precision can be guaranteed, the workload is minimum, and the cost is low. For a particular network, the larger the number of observations (including GPS baseline vectors and conventional ground observations), the higher the overall quality of the network. 4) because of the different mathematical models and the different algorithms of data processing, the results processed by different data processing software are not the same.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TV68;P228.4

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