On the Dynamic Adjustment of Levelling Networks for Repeated Observations in Different Epochs

On the basis of2 and3,this paper put forward two dynamic adjustment schemes of repeated observations in different epochs:(1) a dynamic adjustment of linear kinematic model with a velocity parameter λ;(2) a dynamic adjustment of nonlinear kinematic model with an acceleration parameter γ.This paper deals with the principle for the choice between these two adjustment schemes and the difference of the results from these two kinds of adjustments.Finally,some important characteristics of a dynamic adjustment of levelling networks are presented.