In 1961, 1962 and 1965, three groups were set up in succession to design experiments for space research. The Space Research Laboratory in Utrecht, led by Professor Kees de Jager; the Cosmic Radiation Working Group in Leiden, led by Professor Henk van de Hulst; and the Photometry Working Group in Groningen, led by Jan Borgman, who later became a professor.
The labs designed experiments for scientific soundingrockets and balloons that could observe the outside world for a short period whilst high up in the atmosphere. In the initial experiments, they aimed to measure radiation from the Sun, cosmic rays and UV radiation from stars outside the atmosphere. Furthermore, they developed the first instruments for satellites capable of conducting observations for considerably longer periods whilst in orbit.