ISRO successfully carries out tests of Gaganyaan crew module systems
ISRO successfully carried out three qualification tests for Gaganyaan crew module systems: the Integrated Main Parachute Airdrop Test (IMAT-05), the Crew Module Uprighting System (CMUS) test, and the crew module–service module umbilical separation mechanism test
The main parachute test (IMAT-05) was conducted on July 7, 2026, at the Aerial Delivery Research and Development Establishment (ADRDE) drop zone in Sheopur, Madhya Pradesh, in collaboration with DRDO, the Indian Air Force, and the Indian Army
The CMUS test demonstrated the inflation of the crew module's flotation system using stored cold gas released from a high-pressure bottle through control valves, simulating post-splashdown recovery
The umbilical separation test confirmed clean separation of the mechanism connecting the crew module to the service module, along with the structural stability of the crew module panel and its connecting interfaces
The tests mark further progress toward the uncrewed Gaganyaan-1 (G1) mission, a precursor to India's first human spaceflight
The Gaganyaan Programme — India's Human Spaceflight Mission
Gaganyaan is India's indigenous human spaceflight programme, approved by the Union Cabinet on December 28, 2018, with an initial outlay of ₹10,000 crore; the government sanctioned a further ₹11,170 crore in September 2024, taking the total approved cost to roughly ₹20,193 crore. The programme aims to send Indian astronauts to low Earth orbit (400 km) aboard an indigenously developed spacecraft launched on a human-rated version of the LVM3 rocket, called HLVM3.
Key Details
- Nodal executing centre: the Human Space Flight Centre (HSFC), Bengaluru — established to coordinate crew training, life-support systems, human-rating and certification across ISRO
- Spacecraft configuration: an 8.2-tonne orbital module comprising a 5.3-tonne Crew Module (habitable, pressurised, carries up to three astronauts) and a 2.9-tonne Service Module (liquid-propellant propulsion and power)
- First uncrewed flight test, TV-D1 (in-flight abort demonstration), was successfully completed on October 21, 2023
- Four Indian Air Force test pilots — Prasanth Balakrishnan Nair, Angad Pratap, Ajit Krishnan, and Group Captain Shubhanshu Shukla — were selected and trained (initial training in Russia, followed by training at ISRO's astronaut training facility in Bengaluru) as astronaut-designates for the eventual crewed flight
- Vyommitra, ISRO's humanoid robot, is scheduled to fly aboard the uncrewed G1 mission to simulate crew functions and monitor cabin conditions before any human flight is attempted
The parachute, uprighting, and umbilical separation tests are qualification milestones for the crew module hardware that will fly on G1 — the uncrewed precursor mission that must succeed before ISRO clears a crewed Gaganyaan flight.
Crew Module Deceleration and Recovery System — Parachutes
Re-entry from orbit leaves the crew module travelling at high speed; a staged parachute system is required to decelerate it to a safe splashdown speed in the sea. ISRO's Crew Module Deceleration System uses ten parachutes across four types, deployed in a precise sequence to avoid dangerous oscillations before the main canopies open.
Key Details
- Parachute types and count: 2 Apex Cover Separation parachutes, 2 Drogue parachutes, 3 Pilot parachutes, and 3 Main parachutes (10 total)
- Deployment sequence: an extractor parachute first deploys the drogue parachute to stabilise the descending module; once stabilised, the main parachutes deploy to slow the module to a safe terminal (splashdown) speed
- IMAT-05 test parameters: a simulated single main parachute assembly with a dummy mass was air-dropped from 2.5 km altitude using an Indian Air Force IL-76 aircraft
- Objective of IMAT-05: to qualify the main parachute for structural integrity and design margins under maximum expected load conditions ahead of the G1 mission
- This was the fifth test in the IMAT series, building cumulative confidence in the main parachute system's reliability
IMAT-05 is a design-validation test for the very parachutes that will be used to slow the actual crew module during G1's re-entry and splashdown, directly reducing risk before any human occupant is placed aboard.
Crew Module Uprighting System (CMUS)
After an ocean splashdown, a spacecraft may land in an unstable, inverted, or tilted orientation, posing a risk to occupants and complicating recovery. ISRO has developed a stored cold gas-based Crew Module Uprighting System to automatically right the capsule and keep it stably afloat until recovery teams arrive.
Key Details
- Mechanism: an onboard high-pressure gas bottle releases stored gas through control valves to inflate a flotation/uprighting bag system attached to the crew module exterior
- The recent qualification test used a complete system-level setup incorporating all CMUS components, and successfully demonstrated the gas-release and flotation-inflation sequence
- CMUS is analogous in function to the flotation collars/bags used on other national crew capsule recovery systems (e.g., NASA's Orion, Russia's Soyuz), though the specific gas-storage and valve architecture is ISRO's own design
- The system operates automatically after splashdown, before naval recovery teams (Indian Navy) retrieve the crew module
This test validates the post-landing safety mechanism that would keep an actual crewed module upright and stable in the sea, a critical human-safety requirement that must be certified before astronauts fly.
Crew Module–Service Module Umbilical Separation Mechanism
During the mission, the Service Module supplies the Crew Module with power, propulsion, and other resources through umbilical connectors. Just before re-entry, these connectors must separate cleanly so the Crew Module can safely re-enter the atmosphere alone, protected by its heat shield, while the Service Module burns up or is discarded separately.
Key Details
- The test used a simulated crew module to verify clean separation of the umbilical connectors linking it to the service module
- It also confirmed the structural stability of the crew module panel and its connecting interfaces after separation
- Clean, reliable separation is essential because a failed or partial separation could compromise the crew module's aerodynamic stability, heat-shield orientation, or structural integrity during re-entry
- This mechanism functions analogously to the crew module-service module separation events in other orbital human spaceflight architectures, occurring shortly before atmospheric re-entry begins
Along with the parachute and uprighting tests, this separation-mechanism test completes qualification of the three key hardware systems needed for a safe end-to-end re-entry-to-splashdown sequence ahead of the G1 uncrewed flight.
- Gaganyaan approved by Union Cabinet: December 28, 2018; initial outlay ₹10,000 crore; additional ₹11,170 crore approved September 2024 (total ~₹20,193 crore)
- Orbital module mass: 8.2 tonnes (5.3-tonne Crew Module + 2.9-tonne Service Module); target orbit: low Earth orbit (~400 km)
- Launch vehicle: HLVM3 (human-rated LVM3)
- IMAT-05 main parachute test: July 7, 2026, ADRDE drop zone, Sheopur, Madhya Pradesh; dummy mass dropped from 2.5 km via IAF IL-76 aircraft
- Crew Module Deceleration System: 10 parachutes of 4 types (2 Apex Cover Separation, 2 Drogue, 3 Pilot, 3 Main)
- First successful test flight, TV-D1 (in-flight abort): October 21, 2023
- Four IAF test pilots selected as Gaganyaan astronaut-designates; Vyommitra humanoid robot to fly on uncrewed G1 mission