Positionmeasuringinstrument and method, navigation instrument and method, information service and audio-frequency information transmit-receive method.
位置测量仪器和方法，导航仪器和方法，信息服务及声频信息收发方法。
2
Using the CCD star tracker as the ships positionmeasuringinstrument is considered much for its high positioning accuracy. no position accumulated error, fast and intelligent work.
CCD星体跟踪器作为舰船位置测量仪器，因其定位精度高、无位置积累误差、快速和智能化工作而受到重视。
3
To settle this problem and meet productive demand, we have carried out the design of automatic instrument for measuring form and position deviations of large axles.