ABSTRACT
Navigation is the determination of the position and velocity of a moving vehicle on land, at sea, in the air, or in space. The three components of position and the three components of velocity make up a sixcomponent state vector whose time variation fully describes the translational motion of the vehicle. With the advent of the Global Positioning System (GPS), surveyors use the same sensors as navigators but achieve higher accuracy as a result of longer periods of observation and more complex postprocessing.
