Bengaluru: In a significant breakthrough for India’s space program, the Indian Space Research Organisation (ISRO) has successfully completed the undocking of its Space Docking Experiment (SpaDeX) satellites.
The milestone, announced by ISRO on its official X (formerly Twitter) handle, marks a crucial step in advancing India’s space docking capabilities.
ISRO’s post detailing the event read: “Spadex Undocking Successful! Key sequence of events: SDX-2 extension successful, Capture Lever 3 released as planned, Capture Lever in SDX-2 disengaged, Decapture command issued in SDX-1 & SDX-2. FINALLY, SUCCESSFUL UNDOCKING! Congratulations, Team ISRO!”
Spadex Undocking Successful! 🚀
Key sequence of events:
✅ SDX-2 extension successful
✅ Capture Lever 3 released as planned
✅ Capture Lever in SDX-2 disengaged
✅ Decapture command issued in SDX-1 & SDX-2🎉 FINALLY, SUCCESSFUL UNDOCKING!
Congratulations, Team ISRO! 🇮🇳…
— ISRO (@isro) March 13, 2025
Union Minister of State (Independent Charge) Science & Technology, Jitendra Singh also praised the achievement, calling it a major milestone for India’s space exploration goals. In his post on social media, Singh wrote: “Congrats team ISRO. And heartening for every Indian! SPADEX Satellites accomplished the unbelievable De-Docking… This paves the way for smooth conduct of ambitious future missions including the Bharatiya Antriksha Station, Chandrayaan 4 & Gaganyaan. PM Narendra Modi’s continuous patronage keeps the spirits soaring.”
A Pioneering Mission in Space Docking Technology
Launched on 30 December 2024, the SpaDeX mission has demonstrated advanced docking and undocking capabilities essential for upcoming space programs. Earlier this year, in January, ISRO successfully executed the docking of two satellites under the SpaDeX mission, making India only the fourth country—after the US, Russia, and China—to achieve this feat.
ISRO Chairman V Narayanan highlighted the significance of the mission, stating: “The SpaDeX mission is a fore-runner for several future projects such as the Chandrayaan-4 and the building of the Bharat Antariksha Station, which will involve the use of docking technologies. We want to do multiple experiments. There is a lot of propellant onboard. We also have experiments lined up for the third slot that would be available after two months.”
🚨Just In | Spadex Undocking Successful! 🚀
Congratulations, Team ISRO! 🇮🇳 #ISRO #Spadex #SpaceTech pic.twitter.com/2H1Ts8ATkN
— ISRO InSight (@ISROSight) March 13, 2025
Understanding the SpaDeX Mission
SpaDeX was carried into orbit aboard the PSLV-C60 rocket and is designed to test and validate critical space docking technologies. The mission involves two small spacecraft—SDX-01 (the Chaser) and SDX-02 (the Target)—that dock in low-Earth orbit. This technology demonstration lays the foundation for advanced space operations such as satellite servicing, space station assembly, and deep-space exploration.
The SpaDeX mission has showcased key advancements, including autonomous docking and undocking mechanisms, power transfer between spacecraft, and precision maneuvering using an advanced GNSS-based Satellite Positioning System (SPS). Additionally, the mission will assess payload functionality post-undocking, ensuring efficient in-orbit operations for future space missions.
With this successful undocking, ISRO has reaffirmed its capability to execute complex space operations, further strengthening India’s position in the global space race. This achievement will play a vital role in shaping the country’s ambitious space exploration programs in the coming years.
Also read –
ISRO Marks 100th Rocket Launch with GSLV-F15 Navigation Satellite Mission
