摘要：Space-based navigation has emerged as a forerunner in providing position, velocity and timing services with the advent of various global navigation satellite systems. Satellite-Based Augmentation Systems that improve the quality of service provided by GNSS are expected to replace a significant number of ground-based navigation systems and allow for more efficient use of available airspace. Recognizing the potential benefits of such systems, India took the early initiative and realized its own SBAS called GAGAN — GPS Aided Geo Augmented Navigation — over the Indian region. This article describes the design, development, implementation, testing, and certification of GAGAN
