[16] Penguin Random House India published his autobiography My Odyssey: Memoirs of the Man Behind the Mangalyaan Mission (ISBN 978-0-670-08906-2), co-authored by Radhakrishnan and Nilanjan Routh, in November 2016.

[18] As Project Director, he set up a chain of regional remote sensing service centres (RRSSC) at Bangalore, Nagpur, Kharagpur, Jodhpur and Dehradun for capacity building in central and state government agencies.

[citation needed] While he was the director, RRSSCs came to prominence in the national remote sensing application missions including the Integrated Mission for Sustainable Development (IMSD) aimed at generation of spatial database of natural resources and action plans for sustainable development of land and water resources.

[citation needed] Later, Radhakrishnan succeeded as the mission director of IMSD and moved to National Remote Sensing Agency in Hyderabad.

[18][19] As the director of National Remote Sensing Agency, he scripted India's modern multi-mission ground station for Earth Observation Satellites.

[24] Through an inclusive organisational process, Radhakrishnan charted out clear programmatic directions and nurtured younger generation of leaders for carrying forward the legacy of ISRO.

[7] Re-defining the Chandrayaan-2 mission with Indigenous lander and rover[25] and extending the application of space technologies and tools to all central ministries are highlights of his leadership regime at ISRO.

[29] Radhakrishnan had a stint of five years the Ministry of Earth Sciences to set up, Indian National Centre for Ocean Information Services (INCOIS).

Also, he was trained in Carnatic music by eminent musicians like Prof. Vechoor Harihara Subramania Iyer, Dr. R.K. Srikantan, Dr. Nookala Chinna Satyanarayana; currently he is student of Vidwan R.S.