ANALYSIS ON TROPOSPHERIC DELAY IN ANTARCTIC GPS POSITIONING
1)College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054
2) China National Administration of GNSS and Applications, Beijing 100088
3) State Key Laboratory of Geographic Information Engineering, Xi’an 710054
4) GFZ German Research Centre for Geosciences, Potsdam 14473, Germany
Abstract：Based on quantitative analysis for influence of tropospheric corrected model on the positioning precision in the Antarctic GNSS positioning, a tropospheric corrected model with real meteorological data is proposed to improve positioning precision in the same elevation cutoff angle. Correspondingly, under the condition of keeping the same positioning precision, the model can reduce elevation cutoff angle from 15 degrees to 5 degrees, which means that more lower elevational observations can be used to improve positioning precision and reliability significantly
