Ground-Truthing the Satellites: Summer Fellowship Elevates Africa's Soil-Moisture Network

By: Monica Adjei | September 9, 2026

On Thursday, September 3, our doctoral candidate Adebowale Daniel Adebayo shared the research his summer fellowship helped elevate: a network of ground sensors that measure how much moisture is in the soil across different farming regions of Africa.

Now, why does that matter? Because soil moisture is an early warning sign. When the soil starts drying out, crops struggle days or even weeks later. Satellites can track soil moisture from space, but the most common ones see the ground too coarsely to be useful for Africa's small, mixed farm plots, and there have been almost no stations on the ground to check whether the satellites are getting it right.

Starting from three sensors installed last year in Uganda, Kenya, and Tanzania, the fellowship funded three more across the continent, giving researchers some of the only ground data in Africa to calibrate satellites like NASA's NISAR mission, and sharpen drought forecasts for the farmers who need them most. Preliminary results already show the over- and underestimation at several sites — clear evidence that these products need region-specific calibration to be trusted for African conditions, and proving why local ground truth is important. He is now preparing the station dataset as a data descriptor for the wider research community, and, in a later chapter, plans to fold the validated soil-moisture information into local-scale drought-impact forecasting

If one message came through, it's that none of it happens alone. The network exists because of partners across each country who host and maintain the stations — many installed free of charge through relationships built over years, and much of it carried forward without dedicated funding. It's a quiet illustration of the lab's larger conviction: that the most rigorous science still depends on trust, collaboration, and presence on the ground.