India’s space agency ISRO successfully conducted two hot tests of the Gaganyaan Service Module Propulsion System (SMPS) on July 3, 2025. The tests took place at the ISRO Propulsion Complex in Mahendragiri, Tamil Nadu. This marks a key milestone for India’s first human spaceflight mission, Gaganyaan. The successful trials validate the propulsion system’s readiness for orbital maneuvers and emergency scenarios.

BulletsIn

• ISRO tested Gaganyaan propulsion system on July 3 at Mahendragiri, Tamil Nadu.
• Two hot tests done: one for 30 seconds, another for 100 seconds.
• 100-sec test showed full system performance in near-flight conditions.
• All 5 Liquid Apogee Motors and 16 RCS thrusters fired together.
• Tests confirmed normal function, matched pre-test predictions.
• Ensures readiness for orbital moves, crew safety in emergencies.
• SMPS developed by Liquid Propulsion Systems Centre (LPSC).
• Test article included new design upgrades simulating real missions.
• Full-duration qualification test expected soon.
• Gaganyaan to be India’s first human space mission to low Earth orbit.