Space News ,India :- Following the success of Chandrayaan-3, the Indian Space Research Organisation (ISRO) is actively engaged in advancing technologies crucial for the upcoming Chandrayaan-4 mission, aimed at bringing lunar rock samples back to Earth. Scheduled for launch in the latter part of this decade, Chandrayaan-4 will involve intricate in-orbit spacecraft docking, a critical step in ensuring the secure retrieval of lunar samples.
One of the key initiatives in this technological pursuit is the Space Docking Experiment, or SPADEX, a mission developed by ISRO to test technologies related to orbital rendezvous, docking, and formation flying. Costing ₹124.47 crore, SPADEX comprises two satellites, the Chaser and the Target, which will simulate docking and separation as a mock drill for the impending Moon mission.
SPADEX, a twin spacecraft mission, aims to mature technologies associated with orbital rendezvous, docking, and formation flying, with potential applications in human spaceflight, in-space satellite servicing, and other proximity operations. The Chaser and Target components will autonomously dock and separate in low-Earth orbit, showcasing ISRO advanced capabilities in space navigation and robotics.
The groundbreaking technology essential for SPADEX is currently undergoing testing as the mission progresses towards its launch, the date of which is yet to be finalized. This mission, conceived to refine capabilities in orbital rendezvous, docking, and formation flying, is making substantial strides in its development.
The SPADEX initiative involves two IMS class satellites, each weighing 200 kg. The Chaser and Target are designed to execute precise orbital maneuvers, representing significant advancements in human spaceflight and in-space satellite servicing. The Polar Satellite Launch Vehicle from the Satish Dhawan Space Centre will carry out the launch, injecting both spacecraft into marginally distinct orbits, a critical aspect of the experimental mission.
The primary objectives of SPADEX include demonstrating autonomous rendezvous and docking capabilities, as well as controlling one spacecraft using the Attitude Control System of the other in a docked configuration. Additionally, the mission aims to showcase formation flying techniques and conduct remote robotic arm operations, marking a significant leap forward in space technology.
The SPADEX mission, which began with preliminary studies in 2016 and received government approval in 2017, has undergone substantial development, supported by a funding injection of around ₹125 crore. As ISRO continues to push the boundaries of space exploration, SPADEX stands as a testament to India commitment to advancing space capabilities and technology.
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