Abstract:We use measured surface temperature data to calculate the vertical deformation effect of temperature change on pillar and bedrock of GNSS reference station. Combining with the atmospheric load change, the influence of temperature change on vertical deformation of reference station is comprehensive analyzed. We use Xinjiang GNSS continuously operating reference station data as an example, the results show that the annual impact of temperature change on Xinjiang GNSS continuously operating reference station is 1.4-2.1 mm, and the half-annual amplitude is 0.01-0.33 mm. The annual amplitude accounts for the majority. When the vertical time series change minus the effect of temperature change, the average RMS value is reduced by 0.55 mm, and the accuracy is improved by about 9%. The effect of temperature change and atmospheric load on the vertical deformation is basically same, showing an increase in the first half of the year and a decrease in second half. At the same time, when the two effects are deducted, the accuracy is improved by about 13%. The research in this paper shows that the changes in temperature and atmospheric load are very important factors for the periodic displacement of reference station.
WANG Haitao,NIE Jianliang,TIAN Jie et al. Research on Influence of Surface Temperature Change on Vertical Deformation of GNSS Continuously Operating Reference Station[J]. jgg, 2020, 40(11): 1170-1174.