Summits On The Air (SOTA) is an amateur radio operating award program. Its aim is to encourage operation from mountainous locations. Licensed amateur radio operators combine mountain climbing with operating their radios from the summits of hills and mountains.
Summits on the Air
Those who set up a station on a summit are known as activators and those who work, or contact, summit stations are known as chasers. Similarly, there are two types of award that can be received: One for the activator of the summit and one for the chaser (the operator in contact with the summit).
Points are awarded for operating from a summit or for working a station on a summit. The higher the mountain is, the more points the operator receives. (Wikipedia)