Kalman滤波在船舶GPS导航定位系统中的应用,假定船舶出港沿某直线方向航行，且不考虑机动目标自身的动力因素，将匀速直线运动推广到四维。状态包括水平方向位置和速度和纵向位置和速度。-Kalman filter on the application of GPS navigation and positioning system of the ship, assuming that ship sailing port, along a straight line direction, and r