The principles of the three line CCD scanners and POS/AV510 system are introduced and the formula to compute exterior orientation elements of GPS/INS is derived.

• 摘要介绍了机载线阵CCD传感器和POS/AV510系统的基本原理；推导了GPS/INS（惯性导航系统）的外方位元素的计算公式；