India must use this pressure as an opportunity to diversify trade & accelerate reforms, while safeguarding strategic ties with the US.
ISRO’s Integrated Air Drop Test (IADT) & Gaganyaan Roadmap
What is IADT?
Definition: An experimental test to validate the parachute-based deceleration system that slows down and safely lands the Gaganyaan crew module after atmospheric reentry.
How conducted (Aug 24, 2025):
4.8–5 tonne dummy crew capsules dropped from 3 km altitude using an Indian Air Force Chinook helicopter.
Parachutes deployed in sequence (pilot chute → drogue chute → three main chutes of 25 m each).
Aim: Ensure safe splashdown in sea conditions within 8 m tolerance.
Purpose: Replicate the last and most critical stage of a human spaceflight — safe recovery of astronauts.
Relevance : GS 3(Space )
Agencies Involved
ISRO: Lead agency, developing human-rated systems.
IAF (Indian Air Force): Provided Chinook helicopter.
DRDO labs:
DMRL: Defence Metallurgical Research Laboratory → heat-shield & structural materials.
LRDE: Electronics & avionics for parachute and health monitoring.
Navy & Coast Guard: Recovery readiness in case of failures or emergencies.
Why Multiple Tests are Needed
Human spaceflight demands 99.9%+ reliability (vs ~90–95% for robotic missions).
Tests ensure redundancy & safety under all possible failures:
Crew Escape System (CES) – abort during launch.
Air-drop tests – safe parachute deployment.
Pad abort & in-flight abort tests – already demonstrated in 2018 & 2023.
Uncrewed Gaganyaan missions (G1, G2) before actual astronauts.
Hundreds of subsystem tests (ECLS, IVHMS, escape motors, composites) → certification before human flight.
Preparations for Gaganyaan
Mission goal: Send 3 astronauts to Low Earth Orbit (LEO) for 3 days (~400 km altitude).
Launcher: Human-rated LVM3 (GSLV Mk-III) rocket.
Milestones:
TV-D1 (Oct 2023) → CES pad abort success.
TV-D2 (Dec 2023) → helicopter abort test.
TV-D3 (2024) → multiple abort scenarios.
G1 (Apr 2024) → first uncrewed orbital flight with Vyommitra humanoid robot.
Crewed H1 mission → post-2025 after full validation.
India’s Long-Term Spaceflight Roadmap
Not just Gaganyaan → foundation for broader human space program.
Key milestones announced:
Bharatiya Antariksh Station (BAS) in Low Earth Orbit by 2035.
Crewed lunar landing by 2040.
Technologies needed:
Reusable launch vehicles.
Advanced life-support & environmental systems.
Deep-space propulsion & radiation protection.
Habitability modules for orbital stations.
Strategic & Economic Significance
Prestige: India joins elite club (US, Russia, China) in human spaceflight.