一种用于GNSS接收机动态精度检定的系统设计

A System Design for Kinematic Accuracy Verification of GNSS Receiver

主要介绍了GNSS接收机动态精度检定系统的设计。提出了利用光电传感器的快速响应特性构建GNSS接收机动态精度检定系统的基本方法;设计了基于FPGA和授时模块的高精度触发时间记录电路;给出了利用精确触发时间和触发位置确定动态条件下接收机测量数据"真值"的计算方法;最后分析讨论了该系统检定时的主要误差因素与精度评估方法。该系统可实现GNSS接收机动态测量精度的检定。

The design of kinematic precision verification system for GNSS receiver was mainly introduced in this paper. The basic method was proposed to constructing GNSS receiver kinematic precision verification system using fast response characteristic of photoelectric sensor. High precision trigger time recording circuit based on FPGA and timing module was designed. The calculation method for determining＂true value＂of receiver＇s measured data under kinematic conditions was given by using precise trigger time and trigger position. Finally,the main error factors and accuracy evaluation methods of the verification system were discussed. The system can be use to verify the kinematic measurement precision of GNSS receiver.