Pre-programmed flights gather data at different altitudes then return to bases to recharge and download Weather happens in the boundary layer, the atmosphere from ground level to a few thousand metres, but this can be difficult to study in detail: weather stations are too low, and aircraft are ex...
Source: [Guardian World](https://www.theguardian.com/news/2026/jul/31/weatherwatch-drone-base-station-offers-alternative-weather-balloons)