NEPTool: An Automated Tool for Neutrospheric Variables, GNSS Delay and PWV Modeling

Abstract. NEPTool (Neutrospheric Evaluation and Processing Tool) is an automated system developed for neutrospheric modeling, with applications in geodesy and atmospheric sciences. It provides neutrospheric variables and allows the estimation of neutrospheric delay, such as ZTD (Zenithal Total Delay), ZHD (Zenithal Hydrostatic Delay) and ZWD (Zenithal Wet Delay), as well as the derivation of PWV (Precipitable Water Vapor). These variables are essential for improving both atmospheric monitoring and the accuracy of GNSS (Global Navigation Satellite Systems) positioning. The high accuracy of GNSS positioning (on the order of a few centimeters) is essential for applications including autonomous navigation, topographic surveying, and geodetic deformation monitoring. By integrating data from multiple sources such as, radiosondes, surface meteorological stations, and GNSS observations. NEPTool automates the processing and retrieval of neutrospheric products. This integration fosters a synergy between geodetic and meteorological approaches, supporting studies related to weather forecasting, climate analysis, and natural hazard assessment. Additionally, based on theoretical references and educational materials, NEPTool serves as a complementary learning resource for students and teachers, offering practical insights through its visualizations from graphs and measurement outputs.