中文摘要：

附加二次相位因子（ASF）是影响罗兰C导航/授时系统精度的主要因素。进行ASF修正主要有理论预测法和实测法两种。针对罗兰C到达时间ASF实测修正的需要,本文给出了ASF测量系统的测量原理和测量系统组成,详细介绍了测量系统的设置、软硬件设计。车载试验表明,该测量系统的设计是成功的,能够满足ASF实测的需要。

英文摘要：

The major factor of influencing Loran C navigation/accredit time systematic precision is ASF.There are two methods that is theory forecast method and the method of actual measurement to corrected ASF.According to the demand of ASF actual measurement revises,principle and structure of ASF measurement system are given in this paper.The set of measurement system and the design of software and hardware are introduced.The vehicle-carried test design show that this measurement system is successful and it can satisfy the needs of ASF actual measurement.