Stability Monitoring And Analysis Of Regional CORS Station

CORS station has become the important composition of the geomatic system infrastructure, has characteristics of real-time, fast, high precision, uninterrupted. Since the 1990 s, China's construction of CORS in technology system, construction scale, service ability have made great progress, widely used in surveying and mapping maintenance, land and resources survey, urban planning, disaster prevention and mitigation, national important construction engineering, etc. CORS station stability analysis is the basic premise, guarantee the normal and stable operation of CORS system to maintain and update the geocentric coordinate system in our country at the same time, accurate to determine the velocity field is of great significance. Comprehensive variety of stability analysis method, this paper summarizes a set of complete stability analysis process, the main content is as follows:1.In view of the CORS stability analysis of GNSS data processing put forward the question of high accuracy, this paper summarizes a set of high precision GPS data processing, first to take advantage of TEQC software GNSS raw data preprocessing, check the quality of the decoding data; Then, using GAMIT/GLOBK software for calculating the baseline. And give the important parameters in the software configuration, including the use of observation data type, data processing, error correction model.2.The article discussed carefully plan for analyzing the stability of the CORS station, and use the CORS stations in California's 14 and around 4 IGS stations joint processing experiment analysis, stability analysis of many beneficial conclusion, local CORS station location, construction of our country, the stability monitoring and provide some reference, can effectively maintain local three-dimensional dynamic benchmark.3.The paper analyses some important factors which influence the stability of CORS station, including ocean loading correction, atmospheric load correction, the tidal load correction and GPS baseline solution strategy. In view of the ocean loading effects on stability of CORS station, using GAMIT software with high precision in tidal model, by comparing the stability of the station before and after using the model size, to analyze the effect of ocean loading size; Aiming at the effects of atmospheric stability of CORS station load, by comparing before and after the use of atmospheric load model the size of the station stability, to analysis the influence of the atmospheric load size; In view of the GPS baseline solution strategy for the effect on the stability of the CORS station, by comparing the use different baseline decoding strategy, to analyze the influence of atmospheric load size.