In a groundbreaking achievement, the Indian Space Research Organisation (ISRO) has successfully completed its first-ever Space Docking Experiment (SpaDeX), marking India as the fourth nation in the world—after the United States, Russia, and China—to master in-space satellite docking technology.
The historic mission featured two small satellites, SDX01 (Chaser) and SDX02 (Target), each weighing approximately 220 kg. Launched on December 30, 2024, aboard the PSLV C60 rocket from the Satish Dhawan Space Centre in Sriharikota, the satellites were placed in a 475 km circular orbit, setting the stage for this complex maneuver.
The intricate docking sequence began with the Chaser satellite skillfully maneuvering from a 15-meter hold point to within 3 meters of the Target satellite. ISRO engineers then initiated precise docking operations, successfully capturing and securing the two spacecraft. Following the docking, both satellites were seamlessly controlled as a single unit, with upcoming plans for undocking and power transfer tests to further validate the system.
This monumental success is a significant leap forward for India’s space ambitions, laying the foundation for future missions involving satellite servicing, space station development, and deep-space exploration. Prime Minister Narendra Modi hailed the achievement, calling it “a significant stepping stone for India’s ambitious space missions in the years to come.”
By mastering in-space docking, ISRO has not only showcased its advanced technological capabilities but has also solidified India’s position as a global space powerhouse, opening new doors for sophisticated space operations and international collaborations.
