摘要
详细推导了由地心坐标系中到测站坐标系中的速度转换公式及误差传播公式,并且计算了931个GPS测站点在球面测站坐标系与椭球面测站坐标系中速度分量之间的差别.结果表明,测站高度对速度归算影响的相对变化量在10-4～10-3量级(对于厘米级的速度分量而言,可以忽略不计),球面站心坐标系和椭球面站心坐标系下的速度分量差别主要表现在测站速度的北分量上,通常为10-6～10-5量级,可以忽略不计.但是,对于垂直速度分量较大的测站,两者的差别比较明显.
In this paper, the equations of the velocity transformation and error propagations between the geocentric coordinate system and site-centric coordinate system are given in detail. These equations are applied to transform velocities of 931 GPS stations in China between these two systems . The numerical results show that the effect of station＇s altitude on the velocity transformation is in a relative scale of 10^-4-10^-3 , they can be ignored. The velocity difference between spherical site-centric coordinate system and ellipsoidal one presents itself mainly in the north component, it is generally in a scale of 10^-5- 10^-6 and can be ignored. However, for those stations with larger vertical movements, the difference between sphere and ellipsoid on the velocity transformation is significant.
出处
《大地测量与地球动力学》
CSCD
北大核心
2005年第3期13-18,共6页
Journal of Geodesy and Geodynamics
基金
中国香港特别行政区研究基金委员会项目(代码:A.34.37.PF70)
中国科学院测量与地球物理研究所动力大地测量开放实验室项目
关键词
地心坐标系
球面站心坐标系
椭球面站心坐标系
速度
误差传播
geocentric coordinate system, site-centric coordinate system （sphere）, site-centric coordinate system （ellipsoid）, velocity, error propagation
