ISRO successfully conducts first integrated air drop test for Gaganyaan mission
Sriharikota, August 25. In a major step towards India’s first human spaceflight programme, the Indian Space Research Organisation (ISRO) on Sunday successfully carried out the maiden Integrated Air Drop Test (IADT-01) for the Gaganyaan mission at the Satish Dhawan Space Centre (SDSC), Sriharikota.
The test, conducted in collaboration with the Indian Air Force, Navy, Coast Guard and DRDO, validated the end-to-end performance of the parachute-based deceleration system designed to ensure a safe splashdown of the Crew Module.
Key test details
During the trial, a 4.8-tonne simulated Crew Module (CM) fitted with a parachute system was released from an altitude of about 3 km using an IAF Chinook heavy-lift helicopter. The test sequence closely mirrored an actual mission scenario, including a possible launch-pad abort.
The deceleration sequence began with the firing of Apex Cover Separation (ACS) parachutes to detach the cover, followed by deployment of drogue parachutes for initial braking. These were then released to make way for pilot parachutes, which subsequently extracted the three main parachutes, each 25 metres in diameter. Together, the 10 parachutes reduced the module’s velocity to around 8 metres per second, ensuring a safe touchdown at sea.
Post-splashdown, the module was successfully retrieved by the Indian Navy and ferried back to Chennai port onboard INS Anvesha.
System qualification and safety assurance
The IADT is a part of system-level qualification of the parachute deceleration mechanism, which is crucial for Gaganyaan’s crew safety during re-entry and recovery. ISRO confirmed that onboard avionics played a key role in commanding parachute deployment and recording flight data, which was both transmitted to ground stations and stored in a solid-state recorder for analysis.
The exercise followed extensive modelling and multiple trial sorties with dummy hardware to perfect procedures for the helicopter-based air drop. The Test Authorisation Board (TAB) cleared the mission after rigorous reviews.
Collaboration and next steps
ISRO noted that the success was the result of a multi-agency effort, with contributions from the IAF, Indian Navy, Indian Coast Guard and DRDO. Officials said more such tests under varied deployment conditions are planned in the coming days, as the space agency moves closer to its goal of sending Indian astronauts into space.
The Gaganyaan programme aims to demonstrate India’s human spaceflight capability by sending a three-member crew into low Earth orbit and bringing them back safely.
