引言此测距系统用于测量信号从地面发射机经飞船转发器后回到地面接收机的往返传播时间。共精度和分辨度不受相对于地面发射机或地面接收机的飞船速度的影响。可以连续进行测量,并可按照要求取 Introduction This ranging system is used to measure the round-trip propagation time of a signal from the terrestrial transmitter back to the terrestrial receiver via the spacecraft transponder. Total accuracy and resolution are not affected by the speed of the spacecraft relative to the ground transmitter or ground receiver. Can be measured continuously, and can be taken as required