కింది వాటిలో అంతరిక్ష ఆధారిత బలోపేత వ్యవస్థ ఏది? A. INSAT B. GAGAN C. GSAT D. SARAL

GAGAN (GPS Aided GEO Augmented Navigation), built by ISRO and the Airports Authority of India, is India's Space-Based Augmentation System. It improves the accuracy of GPS signals for aviation. INSAT and GSAT are communication satellites, and SARAL is an oceanographic satellite.