https://www.cnet.com/news/nasa-shrinks-weather-satellites-way-down-to-better-see-inside-storms/

With the RainCube (Radar in a CubeSat), NASA's Jet Propulsion Laboratory wants to see whether smaller satellites can deliver more comprehensive weather data faster, and at a lower cost.

The idea is that mini-satellites that fly together like geese can give more frequent real-time looks inside storms, and thus track the movement of rain, snow, sleet and hail more accurately.