附有条件的边角网消去定向角后方差分量估计

The Variance Part Estimate Eliminating Orientation Angles in the Triangulation Network with Constraints

从含有定向角未知数的附有条件的边角同情况出发，导出了消去定向角未知数后方差分量的估计公式；证明了用投影法消去定向角未知数后误差方程权阵的表达式；化简了Ｇ—Ｍ模型的方差分量估计公式．

Proceed from the triangulation network with restriction constraints containing unkown numbers of orientation angles, the estimate formular of variance part was derived after eliminating orientation angles; the formular of weight matrix error equation was proved by eliminating orientation angles with the projection; and the estimate formular of variance part in G-M model was simplified.