GPS-GLONASS combined position performance accuracy for Indian Defence Application

With the evolution of multi-GNSS in satellite navigation, there is a general tendency to combine satellites of different constellations. GPS+GLONASS hybrid operation has attracted the attention of the users for defense applications from India. An attempt has been made in this paper to compare the precession and accuracy parameters between the GPS and GPS+GLONASS combination for test range applications in the Indian defense programs. It has been observed that GPS+GLONASS hybrid operation provides a slightly better 2-Dimensional (2d) performance while the standalone GPS offers slightly improved 3-Dimensional (3d) performance as found from the precession parameters. This can be an important finding in applications of Multi-GNSS in Indian missiles and other airborne vehicles, and also for calibration of missile and satellite test ranges of India where the height is also an important parameter for consideration.