差分GPS水下立体定位系统

差分GPS水下立体定位系统包括GPS差分基准站、GPS浮标、水下收发机、船基控制中心四部分。差分基准站提供GPS差分改正,实现浮标内置GPS高精度实时定位。GPS浮标完成水上和水下的集成,检测水下收发机发射的定位信号并测量信号到达的时间,同时将各种数据发送到船基控制中心。船基控制中心接收各个浮标的数据后实时解算水下收发机的位置,同时将结果发送给水下收发机。本文首先对系统的总体构成和各个部分的功能进行了介绍,然后详细推导了系统定位算法,最后结合系统试验情况给出了系统试验精度统计结果。

Underwater positioning system Based on DGPS

Underwater GPS positioning system includes four parts which are GPS differential reference station, GPS buoy subsystem, underwater pinger, ship-based data processing and control center. GPS differential station provides real-time differential correction data, and GPS buoy receives differential correction data to calculate real-time dynamic position and output real-time buoy's space coordinate, at the same time GPS buoy also gets the hydro-phonic signal to measure the distance to the underwater targets. The ship-based data processing and control center is the most important part of the system. All the data are transmitted to this center and the underwater target's space coordinates are resolved in this center. In this paper, the system structure and each part's function are introduced firstly. Then, the time measuring and positioning algorithm are developed. Some experiments and numerical results are showed in the end.