Abstract:Aiming at the problem of low interpolation accuracy caused by the spatiotemporal characteristics of regional zenith tropospheric delay (ZTD) in real-time precision positioning, we propose a Kriging interpolation model based on elevation reduction. We use regional CORS network observation data to solve the ZTD value for modeling analysis. Compared with other existing methods, the model can improve interpolation accuracy. When fewer stations participate in modeling, the RMSE can still be kept below 10 mm, which provides a basis for regional real-time high-precision positioning.