The OpenSense Researchers have unveiled the OpenSat4Weather dataset, a comprehensive and openly accessible collection of Ku-band satellite link data designed specifically for precipitation monitoring. This landmark release is intended to promote open research and accelerate the development of applications utilizing Satellite Microwave Links (SMLs).

We describe the OpenSat4Weather public dataset, which features time series of received power from 215 TV-SAT SMLs located in Southern France over a five-month observation period and at 1-min resolution. These data can be processed to gather indirect rainfall intensity measurements. OpenSat4Weather also includes concurrent data from operational rain gauges and weather radars, and ERA5 0°C isotherm height data, to derive the wet fraction of the satellite-to-ground path.

The OpenSat4Weather dataset (Version 1.0, created on 1 August 2025) is publicly accessible and can be downloaded via the following identifier: https://doi.org/10.5281/zenodo.16530166. The preprint discussing the dataset is available under the DOI: https://doi.org/10.5194/essd-2025-537.