不同等级控制网联合非线性平差新方法及其精度评定

A New Method for Different Ranks of Control Network's Simultaneous Nonlinear Adjustment and Its Accuracy Assessment

针对具有不同类型观测数据、不同等级的测量控制网,推导一种不使用导数的解析联合平差模型,克服了传统平差中由于起算数据误差对低级网精度的影响,完全避免了导数的计算而代之以函数的差商,从而减少了计算工作量,并利用一个算例验证了其可行性,对平差结果的精度进行了评定.

Considering that the surveying control network has different types of observation data and different ranks, the author derives an analytical simuhaneous adjustment model without using derivatives, which avoids the impacts of initial data errors on the inferior - rank - network precision in the traditional adjustment, applies difference quotient of functions instead of the derivatives calculation, and thus considerably reduces the calculation time. An example is given to verify its feasibility and the precision of the result is assessed.