GNSS remote sensing technologies including GNSS radio occultations  (GNSS-RO), GNSS reflectometry (GNSS-R), and ground station network have been thriving since last decades. These GNSS observing systems provide globally distributed retrievals of the atmosphere, ionosphere, and Earth’s surface. Emerging technologies - such as polarimetric RO (PRO),  multi-frequency occultations, airborne RO (ARO), and grazing reflections also show strong potential to further expand GNSS remote sensing capabilities. 

This session welcomes submissions including, but not limited to the following topics: 

1. Improving the understanding of atmospheric/ionospheric processes, including planetary boundary layer and space weather.
2. Novel atmospheric/surface science applications, such as hydrology, altimetry or natural hazards, as a result of GNSS remote sensing observations.
3. State-of-the-art retrieval algorithm developments including joint retrievals, data fusion, tomography, and AI/ML.
4. GNSS remote sensing technology advancements and observing concepts such as polarimetric observations, grazing reflections, airborne instrumentation, commercial GNSS observing constellations, and other signals-of-opportunity (SoOp) remote sensing systems.

• AE - Atmospheric and Space Electricity
• NH - Natural Hazards
• NS - Near Surface Geophysics