针对卫星精密定轨过程中观测资料存在粗差以及观测资料的合理定权问题，将抗差方差分量估计引入到卫星精密定轨中。
In this paper, the robust variance component estimation is introduced into the satellite orbit determination to resist the effects of outlying observations and to determine the weights.
本程序能对各种类型的控制网进行严密平差及方差分量估计，并输出平差后的各种信息。
The program can conduct rigorous adjustment and variance component estimation on all kinds of control networks and output all kinds of information after adjustment.
并对两类观测值，利用赫尔默特方差分量估计，通过多次迭代计算，提高平差精度。
With two types of observations, using Helmert variance component estimation, it can improve adjustment precision through multiple iterations.
通过附有条件的间接平差模型进一步证明各类方差-协方差分量估计公式之间的等价性。
In this paper, through the model of parameter adjustment with constraints among the parameters, a further proof on the equivalence of the formulas of variance-covariance components is gives.
众所周知，边角网平差时应进行方差分量估计，以使观测权趋于合理。
It is known that during the side and Angle adjustment of networks, it is necessary to do the variance components estimation to make the weights of observations rational.
为了得到参数的最优估计和合理的精度评定，应利用赫尔默特方差分量估计法进行联合平差处理。
In order to obtain the optimal parameter estimates and reasonable accuracy evaluation should use Helmert variance component estimation method to deal with the combined adjustment.
为了得到参数的最优估计和合理的精度评定，应利用赫尔默特方差分量估计法进行联合平差处理。
In order to obtain the optimal parameter estimates and reasonable accuracy evaluation should use Helmert variance component estimation method to deal with the combined adjustment.
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