The U.S. National Committee for URSI (USNC–URSI) is appointed by the National Academies of Sciences, Engineering, and Medicine, and represents U.S. radio scientists in the International Union of Radio Science (URSI). It encourages studies in radio science, provides a forum for the dissemination of research findings, and provides an organizational infrastructure for the radio science community in the United States. USNC-URSI is organized into ten commissions:

Individuals may become members of one or more of the USNC-URSI Commissions. For more information about USNC-URSI membership, including requirements for Full, Associate, and Early Career membership levels, please visit www.usnc-ursi-archive.org/membership or contact the appropriate Commission Chair(s).

The USNC-URSI hosts the National Radio Science Meeting (NRSM) each January in Boulder, Colorado. This meeting is technically co-sponsored by the Antennas and Propagation Society of the Institute of Electrical and Electronics Engineers (IEEE/AP-S). The IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (RSM), co-sponsored by the IEEE/AP-S and USNC-URSI, is held each summer. Every five to eight years, a North American Radio Science Meeting (NARSM) is organized, co-sponsored by the U.S. and Canadian National Committees for URSI. The last NARSM was held virtually in Montreal, Quebec, Canada on 4-11-July-2020; the next NARSM is planned for August 2025 in Ottawa, Canada.

The international URSI General Assembly and Scientific Symposium (GASS) is held every three years in locations around the world. The 35th URSI GASS was held in Sapporo, Hokkaido, Japan, on 19-26-August-2023. There were over 1400 attendees from 49 countries, and over 1400 papers were presented in technical sessions covering the areas of all ten URSI Commissions. The 36th URSI GASS will be held in Krakow, Poland, on 15-22-Aug-2026.

In addition to the GASS, URSI holds two other flagship meetings every three years, the Atlantic Radio Science Conference (AT-RASC) and the Asia-Pacific Radio Science Conference (AP-RASC). Please visit www.ursi.org for more information on these URSI conferences.

For further information on USNC–URSI please visit New website coming soon.