How Ugandan Nasa scientist Catherine Nakalembe uses satellites to boost farming

As a keen badminton player Ugandan Catherine Nakalembe wanted to study sport science at university but a failure to get the required grades for a government grant set her on a path that led her to Nasa and winning a prestigious food research prize, writes the BBC's Patience Atuhaire.

When Dr Nakalembe tried to explain to a Karamojong farmer in north-eastern Uganda how her work using images taken from satellites hundreds of kilometres above the Earth relates to his small plot, he laughed.

While she uses the high-resolution images in her pioneering work to help farmers and governments make better decisions, she still needs to get on the ground to sharpen up the data.

In other words, from space you cannot tell the difference between grass, maize and sorghum.