关于这些程序的磁航向是通过两种不同的方式计算的。
Magnetic courses on these procedures are calculated two different ways.
计算是不完美的，因此在九年半的时间里，“新视野号”还曾九次点燃推动器，进行小的航向修正。距今最近的一次发生在两周前。
The calculations are not perfect, so New Horizons has also fired its thrusters nine times during the nine and a half years for small course corrections, most recently two weeks ago.
基于磁通门技术的车辆导航系统，由航向及姿态角传感器、路程发送器和计算机组成。
Based on fluxgate technique, vehicle navigation system is composed of the course and pose Angle sensor, distance sensor and computer.
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