基于先验与验后单位权中误差一致的控制网平差计算

Adjustment of Control Network Based on the Same of Priori And Posteriori Estimating Value of Unit Weight Variance

控制网平差计算最终目的是求出未知量和观测值的平差值并进行精度评定,对于同类独立等精度观测值控制网的平差计算,平差结果与单位权中误差先验估值无关,对于观测值不等精度的测边网,传统的平差方法会导致单位权中误差先验值与验后值不一致,本文提出的一种新的平差方法可较好地解决此问题,该方法在高精度桥梁控制网的平差计算中有其实际应用价值.

The ultimate aim of control network adjustment is to derive the adjustment value of unknown quantity and observations ,Analysis show that adjustment results unrelated to prior estimating value of unit weight variance if independent observations are the same class and precision, For trilaterational network which the precision of observations are not equal ,the traditional method would lead to that posterior estimating value and prior of unit weight are not equal .The author presents a new method which can better solve this problem, and the method has its actual value in adjustment of high-precision bridge control network.