在导弹飞行试验时，基于ＧＰＳ的弹道基准系统可替代常规雷达。由于ＧＰＳ弹道基准的精度高，所以可用来评定导弹惯性测量装置的性能。在两发现役的和平保卫者导弹发射前配置了ＧＰＳ转发器和三波段天线。根据ＧＰＳ测量的矩离、矩离增量数据，用卡尔曼滤波方法评定各个ＩＭＵ误差，结果证明ＧＰＳ优于雷达。 GPS-based ballistic reference systems can replace conventional radars during missile flight tests. Due to the high accuracy of the GPS trajectory reference, it can be used to assess the performance of missile inertial measurement devices. Two transponders and three-band antennas were deployed in front of two active defender’s missiles. According to the moment and the moment incremental data measured by GPS, Kalman filtering method was used to evaluate the error of each IMU. The result proves that GPS is better than radar.