India’s on-orbit refuelling satellite initiative represents a critical step toward advanced space logistics, satellite life extension, and sustainable space operations. Spearheaded by ISRO, this technology focuses on autonomous rendezvous, proximity operations, and docking (RPOD), enabling a servicing spacecraft to safely approach, dock with, and transfer propellant to a client satellite already in orbit. The system involves high-precision navigation sensors, relative GPS, lidar and vision-based