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.
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.
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。
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