Single Epoch Similar Single Differential Gps Model In Landslide Monitoring And Landslide Deformation Analysis

GPS carrier-phase relative position has been an important method in the landslip monitoring because of its high precision . Along with the progress of technique in GPS hardware and software, real time automatic monitoring system with high precision will be the trend, it can realize the automation of collecting data and integration of work inside and outside.Using the similar single-difference mathematical model which is base on the character of GPS landslip monitoring to gain the distortion of the coast by dissolving at single epoch, can avoid the delicacy problem of the jumpiness' detection and repair. By that way , the calculation of double difference ambiguity could become more easier, the network adjustment may be avoided ,too. Then the efficiency of data dissolving could be advanced. The model could be used in both static and dynamic observation. When the satellite signal is keepped out badly, the model can gain the distortion data as long as two satellites could be observed. Because the model has only used the observation of L1 wave, it could be used in monochromatic receiver, and so the cost is reduced. The similar single-difference mathematical model ought to be extended because of its huge economy and community benefit. The paper has introduced the course of the dissolvation which is based on the similar single difference algorithm at single epoch, then its feasibility of using in landslip monitoring has been discussed. The data error and model error which may influence the dissolving precision have been discussed ,their origin has been analyzed and the corresponding measurement has been put forward. Moreover ,the affection disciplinarian of part errors has been present.The stability of the datum mark is an important problem in the seasonal observation. We must choose the adjustment method so as classical adjustment, free adjustment, quasi-stable adjustment by the number of datum mark in the observation network, correspondingly, the benchmark could been divided as fixation benchmark , barycenter benchmark , quasi-stable benchmark. In the local landslip monitoring ,we generally used the fixation benchmark. To guarantee the stability of the datum mark, we must make stability checking besides considering the geological factor .The paper has discussed the question of the datum mark in landslip monitoring, analyzed several measures of stability checking, Moreover, some...