| Month | Event | Key Details |
|---|---|---|
| January | SpaDeX Mission (Space Docking Experiment) | - Docking Date: January 16, 2025 - Satellites: SDX01 (Chaser), SDX02 (Target) - Significance: 4th country (after USA, Russia, China) to achieve autonomous docking. Essential for Chandrayaan-4 and Bharatiya Antariksh Station. |
| January | 100th Launch from Sriharikota (GSLV-F15 / NVS-02) | - Payload: NVS-02 navigation satellite - Orbit: Geosynchronous Transfer Orbit (GTO) - NavIC Strengthened: Indigenous atomic clock, L1/L5/S-band payloads. |
| February | World's Largest Propellant Mixer Developed | - Capacity: 10-tonne vertical planetary mixer - Collaboration: CMTI, Bengaluru - Use: Solid rocket motors for LVM3. |
| March-April | Semicryogenic Engine Breakthrough | - Hot Tests: March 28 & April 24, 2025 - Progress: Validated turbo pumps, pre-burner, control systems at 60% power. |
| July | Gaganyaan Propulsion System Validated | - SMPS Test: 30s & 100s integrated firing - Components: 5 Liquid Apogee Motors (440N), 16 RCS thrusters (100N). |
| August | HOPE Mission (Ladakh Space Simulation) | - Duration: 10-day high-altitude isolation - Objective: Human endurance study for space missions. |
| August | Integrated Air Drop Test (IADT-01) | - Purpose: Parachute-based deceleration validation - Collaborators: IAF, Navy, DRDO, Coast Guard. |
| December | Vyommitra for Uncrewed Gaganyaan Mission | - Role: AI-powered half-humanoid to monitor cabin, simulate human presence. |
| December | Drogue Parachute Qualification Tests | - Location: TBRL, Chandigarh - System: 10 parachutes for safe re-entry. |
| December | BlueBird Block-2 Commercial Launch (LVM3 'Baahubali') | - Payload: AST SpaceMobile satellite (USA) - Significance: Heaviest commercial payload launched from India. |
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