Dear colleagues, We would like to draw your attention to a session at the 106th American Meteorological Society Annual Meeting <https://annual.ametsoc.org/2026/> in Houston, TX, USA from January 25 to 29, 2026. Our session is focused on the use of GNSS technology for observations within Atmospheric Science and related disciplines and is intended to be a companion session of the corresponding AGU 2025 session<https://agu.confex.com/agu/agu25/prelim.cgi/Session/251767>: Advancing Earth System Science Research using Global Navigation Satellite Systems Technology. Please see below for more information. Conference Name: 22nd Symposium on Operational Environmental Satellite Systems (joint between 16th Conference on Transition of Research to Operations) Session Name: Atmospheric Science Applications of Global Navigation Satellite Systems Technology Across Scales Session Description: Remote sensing observations that utilize Global Navigation Satellite System (GNSS) signals have been used in geophysical research for decades. GNSS signals are particularly useful for various forms of geophysical research due to its high precision and capability to penetrate clouds and precipitation. GNSS observation techniques such as radio occultation (GNSS-RO) and reflections (GNSS-R) provide high-quality, globally distributed atmospheric retrievals useful in a wide variety of research. Their retrievals also greatly contribute to numerical simulation systems through data assimilation for accurate climate analysis and weather forecasts. This session welcomes submissions including, but not limited to the following topics: 1. Complementary observations of GNSS and other remote sensing or in-situ data for understanding atmospheric processes across scales, 2. Impacts and effects of GNSS observations on numerical weather prediction of significant weather events and data assimilation strategies for GNSS observations, 3. GNSS observations of high-impact weather, such as tropical cyclones, fire weather, atmospheric rivers, and their implications for understanding extreme events, and 4. GNSS remote sensing novel observing concepts such as polarimetric GNSS observations, grazing reflections, and airborne retrievals, and their usefulness for filling observational gaps. As a reminder, AMS 2026 abstracts are due on August 14, 2025 by 17:00 EDT. Submit your abstracts here<https://annual.ametsoc.org/2026/program-events/conferences-and-symposia/22nd-symposium-on-operational-environmental-satellite-systems/>! See you in New Orleans! Kevin J. Nelson – NASA Jet Propulsion Laboratory Kuo-Nung Wang – NASA Jet Propulsion Laboratory Feiqin Xie – Texas A&M University – Corpus Christi Jade Morton – University of Colorado – Boulder Ramon Padullés – Instituto de Ciencias del Espaceio (ICE-CSIC/IEEC) F. Jospeh Turk – NASA Jet Propulsion Laboratory