By The Sampadak Express
The Indian Space Research Organisation (ISRO) has confirmed the successful undocking of its Space Docking Experiment (SpaDeX), a significant achievement that paves the way for the future of space exploration in India, including missions like Chandrayaan-4 and Gaganyaan. The successful undocking, which took place today, marks an important step in ISRO’s ongoing efforts to enhance its capabilities in space docking technology.
The Sequence of Events
In a detailed post shared on X (formerly Twitter), ISRO outlined the precise series of steps that led to the success of the SpaDeX mission. The process began with the SDX-2 extension, followed by the planned release of the capture lever 3. The next key step involved the disengagement of the capture lever in SDX-2, which was then followed by the issuance of the de-capture command for both satellites. This series of orchestrated actions led to the successful undocking of the two satellites involved in the mission.

Acknowledgement from the Union Minister of Science and Technology
Union Minister of Science and Technology, Dr. Jitendra Singh, took to X to congratulate ISRO for its achievement. He expressed his excitement, saying, “Congrats team ISRO. And heartening for every Indian! SPADEX Satellites accomplished the unbelievable De-Docking.” He also highlighted the significance of this achievement, noting that it sets the stage for future missions, including the ambitious Bharatiya Antriksha Station, Chandrayaan-4, and Gaganyaan missions. Dr. Singh also acknowledged the leadership of Prime Minister Narendra Modi, whose continuous support has kept the morale of ISRO high, saying, “PM Narendra Modi’s continuous patronage keeps the spirits soaring.”

The Launch and Mission Overview
The Space Docking Experiment mission was launched on December 30, 2024, from the Satish Dhawan Space Centre. The mission involved two satellites, SDX01 and SDX02, which were referred to as the “Chaser” and “Target” satellites. The satellites were successfully docked on January 16, 2025, setting the stage for today’s successful undocking.
India has now joined the elite group of nations to achieve successful space docking, becoming the fourth country in the world to accomplish this feat, after the United States, Russia, and China.
Future Plans for Space Docking Experiments
ISRO Chairman, Dr. V. Narayanan, had earlier revealed that additional experiments for the space docking mission would begin on March 15, 2025. He explained, “We have charted out a plan and will start the actual experiments from March 15.” Narayanan further explained that the unified satellite is currently in an elliptical orbit, providing a 10-15 day window every two months in which experiments can be conducted.
The Importance of SpaDeX Mission
The SpaDeX mission is designed to demonstrate space docking using two small spacecraft, which were launched into orbit by a PSLV rocket. This mission is a cost-effective initiative by ISRO and is a crucial step towards advancing space technology for future missions. Space docking is particularly important for large-scale space endeavors that require multiple spacecraft to work in tandem towards a common objective. This technology has significant implications for various future missions, including the assembly of the planned Bharatiya Antriksha Station and other interplanetary exploration programs.
India’s Growing Presence in Space Exploration
With this success, India has strengthened its position as a global player in space exploration. The successful undocking of the SpaDeX satellites is a testament to ISRO’s technical prowess and innovation. It is also a critical step towards achieving India’s space exploration goals, which include ambitious missions like Chandrayaan-4, Gaganyaan (India’s human spaceflight mission), and the planned Indian space station.
This breakthrough marks a pivotal moment in ISRO’s journey and signifies the growing capabilities of India’s space program. As the organization continues to make significant strides in space technology, India’s space ambitions are more achievable than ever. The success of SpaDeX is not just a technological achievement but also an inspiration for future generations of scientists and engineers in India and beyond.
As ISRO moves forward with its space exploration agenda, the successful completion of the SpaDeX mission stands as a significant achievement in the development of advanced space technologies that will lay the foundation for India’s future space endeavors.