Stability Analysis And Application Of Satellite Positioningcontinuous Operation Reference Station

The National Satellite Navigation and Positioning Continuous Operating Reference Serv ice System is a modern infrastructure for establishing and maintaining regional with high precision.dynarnic,3D geocentric coordinate reference frame.It is the core of surveying and mapping reference system and geospatial basic framework,and the vital step to achieve a new generation of national high precision space reference.In this paper,the main purpose is to proces the long-term observation data of the continuous operation reference station of satellite positioning in a certain area with high accuracy.In order to get the stability degree of each base station in the study area,the stability of each station is analyzed and the stability by the settlement results.By analyzing the stability of the base station,a scientific and accurate correction model is established to provide the geodetic datum for the geocentric coordinates of the high precision station in the research area.1.Since only one year's stability analysis data of a city's continuous satellite positioning reference station are processed,and there are only five months'data at the B001 site the computing analysis should be based on secular variation so that accquire more objective and rigorous results in order to analyzing coordinate characteristics and stability of the CORS in detail.2.Station coordinate characteristics are analyzed based on EMD method.This method can deal with stationary and non-stationary signals adaptively.Because of the complexity of high time series noise of continuous operation base station of satellite positioning,IMF components from high frequency to low frequency can be obtained,and the main characteristic can be judged by the low frequency IMF.3.For time series of base station stability analysis method,the abnormal sign,al of original signal and earthquake emergencies on site need to be eliminated or deduction,and we could get clean sequence.Time series method can not deduct the non tectonic deformation effect on the reference site.4.Based on the quasi steady adjustment method and time series analysis,we can get the more reliable N,E and U direction characteristics and accurately grasp the motion rule of the datum station.