International Conference on Opportunistic Sensing of Precipitation (OpenSense) - Book of Abstracts

The first International Conference on Opportunistic Sensing of Precipitation, organized as the final conference of the European COST Action CA20136 OpenSense, was held at the German Weather Service, Offenbach, Germany, from 25 to 26 June 2025. 

OpenSense, a EU COST Action, aimed to improve access to continental OS observations, establish OS as a widely acknowledged method capable of providing reliable operational precipitation observations, and facilitate their use in precipitation nowcasting and operational hydrological forecasts.

The topics of the 1st International Conference on Opportunistic Sensing of Precipitation consisted of data and processing methods of opportunistic sensors, the evaluation and application of OS-based precipitation information as well as broader aspects from stakeholder involvement and public benefit. Contributions were made on following topics:

• OS data acquisition, management & standardization
• Processing methods
• Comparative performance analysis and uncertainty assessment
• OS data merging
• Application of OS rainfall data
• Bridging the gap