Principle of action trajectory positioning
In static positioning, the GPS receiver is fixed in the process of capturing and tracking GPS satellites. The receiver measures the propagation time of GPS signal with high precision, and calculates the three-dimensional coordinates of the receiver antenna position by using the known on-orbit position of GPS satellite.
Dynamic positioning is to measure the trajectory of a moving object with a GPS receiver. The antenna of the GPS receiver on the carrier moves relative to the earth in the process of tracking the GPS satellite, and the receiver measures the state parameters (instantaneous three-dimensional position and three-dimensional speed) of the moving carrier in real time by using GPS signals.