Fundamentals of Inertial Navigation Systems and Aiding

Inertial navigation systems (INS) are modern technologically sophisticated implementations of the age-old concept of dead reckoning. The basic philosophy is to begin with a knowledge of your initial position, keep track of speed and direction, and thus be able to determine position continually as time progresses. It is used in widely in aircraft and space navigation systems, but also increasingly in GPS style navigation applications for drones, mobile phones, fitness trackers etc