presently i'm doing b.tech final year in elec and instrumentation. is it possible to do masters in aerospace/maintenance in this institute.

IIT Delhi offers research in atmosphere science. If you have good percentage you will must get admitted surely (80% or 8+ CGPA in any branch).

BIT does not offer masters in aerospace, however, Here is the list of colleges offering Mtech in aeronautical engineering: Indian Institute of Technology, Kharagpur WB Indian Institute of Technology Chennai Tamil Nadu Institute of Aerounautical Engineering Jawaharlal Nehru Technological Univers