hi,

the basic eligibility criteria for phd in atmospheric science and space science is the candidate need to have a pass master degree in engineering or in science with the first division marks in relevant discipline from a recognized institute. for phd in iit some times gate score is required.

colleges which offer phd in this discipline is,

Centre for Earth Atmosphere and Weather Modification Technologies (CEA and WMT), Hyderabad

Indian Institute of Technology (IIT Delhi), New Delhi