Abstract:We use the GNSS occultation data of Fengyun 3C meteorological satellite independently developed by China to retrieve the atmospheric temperature profile from March 1, 2017 to February 28, 2018. We estimate tropopause height change and verify it using the sounding balloon data and ERA5 model data. With a spatial resolution of 2°×2°, China is divided into 608 cells according to latitude and longitude. For each cell, we calculate the tropopause parameters, and a grid model is established to analyze the temporal and spatial distribution characteristics of tropopause parameters in China. The results show that the tropopause parameters have obvious zonation characteristics with latitude, but not obvious change in longitude, which shows that the north-south region is asymmetric, and the east-west region is more symmetrical. The tropopause parameters have obvious seasonal characteristics.