New Insights in GNSS Remote Sensing for Ionosphere Monitoring and Modeling

This Remote Sensing Special Issue, "New Insights in GNSS Remote Sensing for Ionosphere Monitoring and Modeling", presents cutting-edge research on using Global Navigation Satellite System (GNSS) signals to probe the Earth's ionosphere. The collection advances techniques for detecting space weather perturbations, from typhoons to solar activity, using advanced algorithms and multi-sensor data fusion. It also features improved modeling approaches for ionospheric electron content and its spatiotemporal variations, which are critical for enhancing GNSS positioning accuracy and reliability. Furthermore, several contributions demonstrate how precise ionospheric correction enables other GNSS remote sensing applications, such as monitoring precipitable water vapor for meteorological studies. Collectively, these ten papers provide valuable tools and insights for scientists in geodesy, space weather, and satellite communication, highlighting GNSS's vital role in understanding our near-Earth space environment.