Abstract:Based on the Helmert transformation model, we detect and eliminate possible gross errors in the prior coordinates of the starting points. Then, we construct the minimum constraint conditions based on the similarity transformation of the remaining starting points coordinates. Finally, we determine the entire coordinate framework. We select the weekly observation data of IGS stations and GNSS reference stations in and around China, and use ITRF2014 coordinates of IGS stations to construct parameter weighted constraints, minimum constraints and Helmert model constraints, considering prior coordinate error of IGS stations to obtain coordinate results of the whole network. The results show that Helmert model method can effectively weaken the influence of gross coordinate errors of starting points on the mesh distortion, and improve the accuracy and reliability of the regional reference frame to a certain extent.
WANG Panlong,HOU Wencai,JIANG Guangwei et al. Research on Constraint Method of Regional Reference Frame Considering Errors of Starting Points[J]. jgg, 2024, 44(1): 39-45.