Hello raman,

For admission in Indian institute of space science and technology, trivannntapuram through your jee advance marks .

As you should know that the merit list for this college remain very high every year. So you should have a rank somewhere under 500 to fet admission there through your jee exam.

The procedure goes same like that of IITs through jee advanced i.e through counselling  seat allotment process.

Hope it helps. 

Thank you :)