卫星激光测距与甚长基线干涉测量的天线旋转中心的直接解法

内容简介：利用两类约束条件建立旋转中心与标志观测值之间的直接关系.第一类约束是卫星激光测距(SLR)或甚长基线干涉测量(VLBI)上的观测标志绕其旋转轴旋转形成一个由平面和球面相割得到的平面圆.第二类约束是 SLR 或VLBI 的旋转中心与其垂直轴旋转圆心在同一铅垂线上，与其水平轴旋转圆心在同一水平面上.根据这两类约束条件建立相应的观测方程和条件方程，利用标志点观测值直接解算旋转中心的坐标及其协方差阵.利用我国两个 GNSS 与 SLR 或 VLBI 并址站的实测数据，求解基于本文直接解法的空间归心基线.结果表明，与已有分步解的差值不超过1 mm.

Abstract：An approach is developed to directly solving the co-located tie vector by using two kinds of constraints between SLR and VLBI?s antenna rotation centers and surveying marks.The first constraint is that the mark forms a planar circle when it rotates along with its rotation axis, which can be modeled as the intersection of a plane and a sphere.The second constraint is that the rotation center lies in the same plumb line with the rotation center of vertical axis,and in the same plane with the rotation center of horizontal axis.The corresponding observation equations and condition equations are established according to the two kinds of constraints.The tie vector and its covariance matrix are directly resolved by using the observations of the mark points.The space differences baseline are solved based on the direct approach using measured data of two GNSS and SLR or VLBI co-location.The results show that the difference is not more than 1 mm compared with two step solutions.

作者：马下平, 沈云中, 王解先, 吴斌, 游新兆,

关键词：全球卫星导航系统, 卫星激光测量, 甚长基线干涉测量, 归心基线, 空间归心测量,