| GNSS相应坐标系之间的关系及其影响 |
| |
| 引用本文： | 曾安敏,杨元喜,明锋,景一帆.GNSS相应坐标系之间的关系及其影响[J].测绘科学技术学报,2016(6):551-556. |
| |
| 作者姓名： | 曾安敏 杨元喜 明锋 景一帆 |
| |
| 作者单位： | 1. 信息工程大学,河南郑州450001;地理信息工程国家重点实验室,陕西西安710054;西安测绘研究所,陕西西安710054;2. 信息工程大学,河南郑州,450001 |
| |
| 基金项目： | 国家重点研发计划项目(2016YFB0501701)，国家863计划项目(2013AA122501)，国家自然科学基金项目(41474015 |
| |
| 摘 要： | 不同的GNSS采用的坐标系定义几乎相近,但参考椭球及其坐标实现不同,这将影响多GNSS融合导航定位效果。根据各GNSS坐标系所采用参考椭球的基本常数,计算比较了不同坐标系参考椭球参数的差异;导出了相应的正常重力公式,比较了这些正常重力公式确定的正常重力值差异;最后分别从坐标系统的定义与实现两个方面分析了其对定位结果的影响。结果表明:1)GPS(BDS)与Galileo和GLONASS所使用的参考椭球引起正常重力差约为0.15和0.30 mgal;2)GPS与BDS,Galileo及GLONASS所使用参考椭球引起纬度分量最大差异约为0.1 mm,3 cm和3 cm,高程分量约为0.1 mm,0.5 m和1 m;3)各GNSS所使用坐标框架间转换参数引起的坐标变化达到厘米级。
|
| 关 键 词： | 全球卫星导航系统 坐标系 参考椭球常数 定位 正常重力 |
Comparison of Ellipsoids for GNSS Geodetic Coordinate System |
| |
| ZENG Anmin,YANG Yuanxi,MING Feng,JING Yifan.Comparison of Ellipsoids for GNSS Geodetic Coordinate System[J].Journal of Zhengzhou Institute of Surveying and Mapping,2016(6):551-556. |
| |
| Authors: | ZENG Anmin YANG Yuanxi MING Feng JING Yifan |
| |
| Abstract: | Different navigation satellite system uses nearly the same coordinate system,but different ellipsoid and different coordinate frame are adopted,which result in the compatibility and interoperability problems for multiconstellation GNSS.It will also result in positioning discrepancy for geodesy users.According to the definition of el lipsoid adopted by GPS,BDS,GLONASS and Galileo,the geometrical and physical parameters of ellipsoids are derived and compared with WGS84,CGCS2000,GTRF,PZ90.11,respectively.The corresponding normal gravity formulas are derived and the normal gravity values are computed in the different latitude,too.According to the da tum definition,positioning differences are computed by using generalized coordinate transformation formulas.The ellipsoid differences among GPS (or BDS) and Galileo,GLONASS result in that the maximum normal gravity discrepancy about 0.15 mgal and 0.30 mgal,respectively.The ellipsoid differences among GPS and BDS,Galileo,GLONASS result in the maximum latitude discrepancy about 0.1 mm,3 cm and 3 cm,respectively,while their el lipsoid differences caused in the maximum height discrepancy about 0.1 mm,0.5 m,and 1 m,respectively.Transformation parameters among coordinate frame of GPS,BDS,Galileo,and GLONASS result in the coordinate cmdiversification,which is not neglected by geodetic project. |
| |
| Keywords: | GNSS geodetic coordinate system reference ellipsoid positioning normal gravity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
