Satellite based

The Indian Space Research Organisation (ISRO) is offering a free online course for teachers on space technology, to be held from 31 May to 4 June. Here's what you need to know about the requirements, eligibility criteria, and insight into what you'll learn.

Developed by CRIS (Centre for Railway Information Systems) in collaboration with ISRO, the RTIS device installed in the locomotive will detect the position and speed of trains with the help of ISRO-developed GAGAN geo-positioning system.