- M. Sc. – 1979,I.I.T. Madras
- Predoctoral : 1980
- Ph.D.– 1988 TIFR, Bombay
- Postdoctoral :1988-1993 Nuffield Radio Astronomy Labs., Jodrell Bank, University of Manchester, England.
Research interests: Study of gravitational lenses, astrometry of compact radio sources, molecular absorption lines towards extragalactic radio sources. - Present Status: since-1993, Staff Astronomer, Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn, Germany. Tel: +49 (0)228 525 231; fax: +49 (0)228 525 229.
- Email : apatnaik@mpifr-bonn.mpg.de
