Design of Error Handling and Redundancy Management of Dual Redundant GNSS Embedded Navigation Computer for Launch Vehicle Missions

With advancements in GNSS technology in the last two decades GNSS receivers are finding their place in Indian launch vehicle missions also. A GNSS receiver embedded Navigation Computer (GNC) is developed for executing the functions of inertial navigation, GNSS receiver and aided navigation. The processor board is designed using COTS components for making it low cost. A set of specific self-test methods are designed for detecting any deviations from the normal working of the processor. A final switch flag is generated taking all the factors into consideration. The algorithms are validated through a set of simulation tests on target hardware.