Dr Swarup guided and supervised the establishment of the Ooty Radio Telescope from the basic concept to detailed design and fabrication. The construction in all its aspects. i.e. mechanical, structural, microwave and electronics, has been entirely indigenous. This work has had considerable technological spin-offs for the development of microwave antennas in India. Dr Swarup has also investigated solar emission, in India. Dr Swarup has also investigated solar emission, pulsars and lunar occultations of extragalactic radio sources.