“Measuring nuclear yield depends on multiple parameters - the location and number of instruments, the geology of the area, the location of the seismic station in relation to the test site.”

Indian aerospace engineer and science administrator

A. P. J. Abdul Kalam was an Indian aerospace engineer and science administrator who served as president of India from 2002 to 2007. He is remembered for his role in public life and for his work in science and defence technology. In 1997, he received the Bharat Ratna, India’s highest civilian honour, for his contribution to scientific research and the modernisation of defence technology in India. His public voice often reflected his work in science, service, and national development.