The BD receiver can measure the pseudo distance between the satellite and the user, so that it can work in the passive positioning system.

目前已经能够研制出测量用户至卫星伪距信号的“北斗”用户接收机，此款接收机可以工作在无源定位的情况下。

youdao

Basing on the Double star Active Positioning System, this article conducted the research on the Beidou Tri-star Passive Positioning System.

本文在北斗双星有源定位系统的基础上进行了三星无源定位的研究。

youdao

This paper introduces a user terminal equipment for the double-satellite positioning system. The terminal, named continuous navigation passive positioning system, is based on Rubidium atomic clock.

介绍了一种基于铷钟的双星系统用户终端机——连续导航无源双星定位系统。

youdao