描叙了POS系统的运行原理，并结合原理分析了POS系统在航空摄影应用时应该注意的偏心分量测量、POS设备初始化、数据精度控制及基站架设等问题，最终结合实际的航摄飞行要求对POS系统在实际航空摄影中出现的上述问题提出预防措施和解决办法。

The operation principle of POS (Position and Orientation System) is firstly described. Furthermore, problems need to be noted such as eccentricity component measurement, initialization of POS device, accuracy of data control and construction of base station are analyzed. Solutions and preventive measures are proposed in line with the requirements of practical aerial photography. The POS system has been used and tested successfully in several practices.