Portal:Scotland/Selected article/Week 41, 2008

Sir Robert Alexander Watson-Watt, FRS FRAeS (April 13, 1892–December 5, 1973), is considered by many to be the "inventor of radar". Radar development was first started elsewhere (see History of radar), but Watson-Watt worked on some of the first workable radar systems, turning the theory into one of the most important war-winning weapons. Born in Brechin in Angus, Scotland, he was a descendant of James Watt, the famous engineer and inventor of the practical steam engine.

After attending Brechin High School, he was accepted to University College, Dundee (which was then part of the University of St Andrews but became the University of Dundee in 1967). He graduated with a BSc in engineering in 1912, and was offered an assistantship by Professor William Peddie. It was Peddie who encouraged him to study radio, or "wireless telegraphy" as it was then known.

In 1915 Watson-Watt wanted a job with the War Office, but nothing obvious was available in communications. Instead he joined the Meteorological Office, who were interested in his ideas on the use of radio for the detection of thunderstorms. Lightning gives off a radio signal as it ionizes the air, and he planned on detecting this signal in order to warn pilots of approaching thunderstorms.

His early experiments were successful in detecting the signal, and he quickly proved to be able to do so at long ranges. Two problems remained however. The first was locating the signal, and thus the direction to the storm. This was solved with the use of a directional antenna, which could be manually turned to maximize (or minimize) the signal, thus "pointing" to the storm.