测绘通报 ›› 2019, Vol. 0 ›› Issue (11): 126-129.doi: 10.13474/j.cnki.11-2246.2019.0365

• 技术交流 • 上一篇    下一篇

GNSS水准自适应联合平差

丁阿鹿1, 田婕2, 聂建亮2, 刘晓云2, 郭鑫伟2, 赵大江2, 张海平3   

  1. 1. 北京市勘察设计研究院有限公司, 北京 100038;
    2. 自然资源部大地测量数据处理中心, 陕西 西安 710054;
    3. 山东省国土测绘院, 山东 济南 250102
  • 收稿日期:2019-06-21 修回日期:2019-08-27 发布日期:2019-12-02
  • 通讯作者: 田婕。E-mail:chd_tianjie@126.com E-mail:chd_tianjie@126.com
  • 作者简介:丁阿鹿(1988-),女,硕士,工程师,主要研究方向为地壳形变分析。E-mail:13552691511@163.com
  • 基金资助:
    国家自然科学基金(41774004;41574003;41604001)

The adaptive combination adjustment of GNSS and leveling data

DING Alu1, TIAN Jie2, NIE Jianliang2, LIU Xiaoyun2, GUO Xinwei2, ZHAO Dajiang2, ZHANG Haiping3   

  1. 1. BGI Engineering Consultants LTD, Beijing 100038, China;
    2. Geodetic Data Processing Center of Ministry of Natural Resources, Xi'an 710054, China;
    3. Institute of Land Surveying and Mapping of Shandong Province, Jinan 250102, China
  • Received:2019-06-21 Revised:2019-08-27 Published:2019-12-02

摘要: 将水准高差观测值与GNSS垂直运动速度作为观测值,利用联合平差方法实现GNSS水准自适应数据融合。均匀选取大地高变化与正常高变化一致的GNSS水准点作为约束点,实现GNSS垂直运动与水准垂直运动的有效匹配;利用方差分量估计方法自适应整体调整水准高差观测值权阵与GNSS垂直运动速度观测值权阵之间的比例关系;采用相关等价权函数抑制异常观测值的影响,提高联合平差的精度。以山东境内二等水准网及GNSS控制点数据为例,该方法能够实现GNSS与水准高程变化的有效融合,提高高程变化分析的可靠性。

关键词: 垂直运动, 限制条件, 联合平差, 数据融合, 方差分量估计

Abstract: The combination adjustment is used to adaptively fuse GNSS and leveling by using the leveling height difference value and GNSS vertical velocity as observations. The constrained GNSS leveling points with the consistent movement trend between geodetic height and normal height are uniformly chosen to match the vertical movement. The scale of weight matrix between GNSS and leveling is adaptively computed and adjusted with the variance component estimation. The relative equivalent weight function is adopted to control the influence of the outlier and to improve the accuracy of combination adjustment. The GNSS and second-order leveling data in Shandong province is applied to test the new algorithm. It is shown that the algorithm can not only fuse the velocity of GNSS and leveling, but also improve the reliability of height variety in Shandong province.

Key words: vertical movement, constrain, combination adjustment, data fusion, variance component estimation

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