the Pacific (affiliated to the United Nations), with headquarters at Dehradun during 2006–2009. Positions held 2010-2018: Honorary Distinguished Professor, Indian Space Research Organization 2006-2009: Director, Centre for Space Science and Technology Education in Asia and the Pacific 2003-2006: Honorary Distinguished Professor, Indian Space Research Organization 1998-2003: Satish Dhawan Distinguished Professor 1994-1998: Director, Space Applications Centre, Ahmedabad 1990-1994: Associate Director, Space Applications Centre, Ahmedabad 1985-1994: Dy. Director (Remote Sensing), Space Applications Centre, Ahmedabad 1975-1985: Head, Sensor Development Division, Space Applications Centre, Ahmedabad 1973-1975: Scientist/Engineer, Remote Sensing & Meteorology Applications Division, Space Applications Centre, Ahmedabad 1970-1973: Fellow, Tata Institute of Fundamental Research, Bombay 1962-1970: Research Associate, Tata Institute of Fundamental Research, Bombay 1961-1962: Trainee (Physics), Atomic Energy Establishment School 1959-1961: Lecturer in Physics, Union Christian College, Alwaye (Affiliated with the University of Kerala) Special Responsibilities/Assignments (International /National) 2010-2020 : Editor-in-Chief Journal of the Indian Society of Remote Sensing 2012: Member Scientific Advisory Committee, Indian Institute of Astrophysics, Bangalore 2010: Chairman Review panel of the Tata Institute of Fundamental Research Balloon Facility 2010: Member, State Council of Climate Change, Govt of Himachal Pradesh 2004–2006: Member, Governing Council, Indian National Centre for Ocean Information Services, Hyderabad 2003–2004: Member of the International Academy of Astronautics Study Team on `Space to promote peace –initial focus on reconstruction of Afghanistan 2002–2004: President, Indian Society of Remote Sensing 1999–2001: President, Gujarat Science Academy 1999 : Consulting Faculty, Taleem Research Foundation, Ahmedabad 1997–1998: Member, Steering Committee, Centre for Development of Advanced Computing, Pune 1997–2000: Member, Research Council, National Institute of Oceanography 1996–2000: President, Technical Commission-I, International Society for Photogrammetry and Remote Sensing 1996–1999: President, Indian Society of Geomatics 1994–1997: Member, Research Council, Central Glass and Ceramic Research Institute, Calcutta 1994–1996: President, Indian Society of Remote Sensing 1993–1996: Vice-President, Indian Society of Geomatics 1993–1996: Member, Management Council, Vikram Sarabhai Centre for Development Interaction 1992–1998: Member, Andhra Pradesh State Remote Sensing Applications Centre Society 1989–1998: Member, Governing Body of Centre for Earth Science Studies, Trivandrum 1988–1998: Member, Advisory Committee for Remote Sensing Applications Centre, Madhya Pradesh, Bhopal 1988–1991: Member-Secretary, Indian National Committee for Space Research 1985–1988: Member, Governing Council, Indian Institute of Astrophysics, Bangalore Special Responsibilities/Assignments (Indian Space Research Organization) 2017–2019: Chairman Advisory Committee on Space Science 2010: Member Committee to Review the Chandayaan-2Payload Proposals 2005–2017: Vice-chairman, Advisory Committee on Space Science 2004–2008: Chairman, Science Advisory Board, Chandrayaan-1 2004–2015: Chairman, ASTROSAT Payload Monitoring Committee 2009–2018: Chairman, Scientific Advisory Committee, Space Physics