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目前的飞行校验系统以GPS作为空间基准,这种定位方式在精度、性能、可靠性方面都存在着固有缺陷.本文介绍的同步定位.姿态.导航(SPAN,Synchronous Position,Attitude and Navigation)技术集合了两种不同但互补的技术:全球导航卫星系统(GNSS,Global Navigation Satellite System)定位技术和喷性导航技术.通过二者的结合,SPAN技术可以达到取长补短的目的,组合后的导航系统无论在精度、性能、可靠性方面都优于单独的子系统.将这项技术应用于飞行校验系统,利用GNSS定位的绝对精度加上惯性测量单元(IMU)陀螺和加速计测量的稳定性,就可以在卫星信号丢失或者高动态应用环境下仍然提供持续、稳定、可靠的位置及姿态数据.“,”Global Positioning System is presently used as space reference for flight inspection system. However, this mode of positioning has inherent flaws in accuracy, performance and reliability. SPAN (Synchronous Position, Attitude and Navigation) technology introduced in the paper includes the two different yet complementary positioning and navigation technologies, GNSS (Global Navigation Satellite System) and Inertial Navigation System (INS). Combining GNSS with INS has the capability of being more accurate and reliable in accuracy, performance and reliability than either GNSS or INS has. The application of SPAN on flight inspection system can ensure the implementation of continuous, stable and reliable position and attitude data under loss of GPS signal and high dynamic environment by using absolute accuracy of GNSS positioning and the stability of inertial measurement unit (IMU) gyro and accelerometer measurements.