For General Category, the IIST Trivandrum Aerospace, Avionics and Electronics cutoffs go no less than 35% in JEE Advanced  which takes your score almost around 125 in the exam. At this Marks, and considering current trends you can expect a Rank of 8k.

Aerospace and Avionics unlike other branches is usually chosen by students interested in this subject and its applications in the space and aeronautical industry and in organizations like ISRO, Airbus, Boeing and so on. Aerospace Engineering is kot in many IITs. Cutoffs at Top IITs like Bombay, Madras, Kanpur and Kharagpur range between 2-4k. Hence after IITs, most students in the 3-10k range in General Category opt for IIST Trivandrum for achieving in depth education in Aerospace and Avionics Studies with constant mentoring and projects by ISRO and Department of Space, Government of India.

For more information do follow the link below

https://www.careers360.com/university/indian-institute-of-space-science-and-technology-thiruvananthapuram