The observation of ocean velocities is of key importance for understanding the ocean and managing human activities at sea. Yet, these observations face challenges due to sampling issues and the absence of direct satellite measurements. Currently, High-Frequency Radars (HFR) stand as the sole operational tools capable of delivering extensive surface current observations. HFR can offer high-resolution velocity data, typically ranging from 1 to 5 km, for coastal areas extending up to 100 or 200 km, contingent on the frequency used. Over recent years, HFR networks have strengthened and emerged as a crucial source for measuring ocean velocities. This expansion has been paralleled by advancements in analysis techniques and an increase in HFR applications. Additionally, upcoming satellite missions like ESA's Harmony missions are anticipated to enhance the scope of coastal HFR measurements.

This session aims to foster interdisciplinary dialogue among scientists innovating HFR methods, oceanographers utilizing HFR data in their studies, and researchers exploring new satellite-based concepts for measuring surface velocities. We invite contributions covering all facets of HFR development and application in oceanographic research. Topics for discussion include, but are not limited to, the application of HFR data to oceanographic challenges, novel methods for HFR data analysis, and leveraging synergies with existing missions (such as the Sentinel constellation, SWOT, etc.) or future missions like Harmony.