摘要
介绍当今确定天文大地垂线偏差的新仪器———CCD自动天体测量仪和确定两点间高程异常差的新方法。该方法用单极坐标代替繁琐的双极坐标进行计算。讨论了天文重力水准的误差及垂线偏差非线性影响等问题。估计在不久的将来 ,用这一手段施测山区似大地水准面的精度可望达到厘米级。
A new means of determining astro geodetic deflection of the vertical CCD automatic astrometer and the new method to determine the difference of height anomalies between two points are described.In the algorithm the calculation of complicated coordinate of double pole is substituted by the calculation of the coordinate of single pole.Futhermore, problems of the error of astro gravimetric leveling and the nonlinear influence are discussed.It is estimated that before long by this means the accuracy of the quasigeoid in mountianous area can reach centimeter order.
出处
《大地测量与地球动力学》
CSCD
2002年第4期31-34,共4页
Journal of Geodesy and Geodynamics
基金
中国科学院创新工程
