| 附加垂线偏差参数的地面常规网与GNSS基线网联合平差 |
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| 引用本文： | 马下平,游为. 附加垂线偏差参数的地面常规网与GNSS基线网联合平差[J]. 武汉大学学报(信息科学版), 2017, 42(4): 550-557. DOI: 10.13203/j.whugis20150040 |
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| 作者姓名： | 马下平 游为 |
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| 作者单位： | 1.西安科技大学测绘科学与技术学院, 陕西 西安, 710054 |
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| 基金项目： | 西安科技大学博士启动基金2016QDJ005 |
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| 摘 要： | 根据测站的垂线站心坐标系和法线站心坐标系之间的转换公式，将垂线偏差作为未知参数，列出地面常规网观测量（水平方向、垂直角和边长）在空间直角坐标系中的观测方程，并结合GNSS网的观测方程，推导出附加垂线偏差的GNSS网和地面网联合平差的参数估计及其精度评定公式。利用含有GNSS观测量和地面常规网观测量的实例数据解算出垂线偏差，分析了垂线偏差对平差结果的影响。结果表明，将垂线偏差作为未知参数，能够消除垂线偏差对观测值的影响，显著提高未知点坐标的解算精度及可靠性。
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| 关 键 词： | 垂线偏差 地面常规网 GNSS基线网 法线站心坐标系 垂线站心坐标系 |
| 收稿时间： | 2015-05-23 |
Combined Adjustment of Terrestrial Network and GNSS Network with Additional Parameters of Vertical Deflection |
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| Affiliation: | 1.School of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China2.Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | According to the conversion formula between the normal topocentric and vertical topocentric coordinate system, Observation equations with observations such as horizontal direction, vertical angle and distance of ground network in space-rectangular coordinate system are listed when considering the vertical deflection component as unknown parameters. Parameter estimation and precision evaluation formula of combined adjustment of GNSS network and terrestrial network with additional vertical deflection are deduced. The vertical deflection is solved using real data of GNSS observations as well as the Terrestrial network. The results show that the new approach can eliminate the influence of vertical deflection to the observations when considering the vertical deflection component as unknown parameters, thus this approach can remarkably improve the calculating precision and reliability of the unknown point coordinates. |
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