Monitoring and analysis of GNSS landslide geological hazard based on virtual reference station

The application of Global Navigation Satellite System (GNSS) technology to landslide monitoring has the problems of difficult location selection of reference stations, high construction cost and unstable datum. The method of monitoring landslide geological disasters based on virtual reference station (VRS) is used. The continuous operation reference station (CORS) is used to generate virtual reference station data in the monitoring area to replace the physical reference station for landslide monitoring. Through experiments and analysis, the monitoring accuracy of virtual reference station under different solution strategies is obtained, and the results after gross error elimination are compared with the traditional GNSS monitoring. The results show that the 2 h monitoring accuracy of the virtual reference station can reach 5 mm in plane and 25 mm in elevation. The displacement trend reflected by the virtual reference station is consistent with the traditional GNSS monitoring.