Ten years after its initial approval, India’s long-awaited international competition to build six advanced submarines has begun.

India’s space agency and NASA have begun building hardware for the joint Nisar dual-frequency synthetic aperture radar satellite, due for launch in 2021.

India plans to launch a backup Indian Regional Navigation Satellite System spacecraft in August to replace the ailing IRNSS-1A satellite, which has seen all three of its rubidium atomic clocks fail.