天文/GNSS组合定向系统研究

Design of Astronomical/GNSS Combination Directional System

虽然天文定向精度较高,但对天气要求也高,而全球卫星系统(global navigation satellite system,GNSS)定向不受天气影响。针对这些特点,采用Y/JGT-01天文测量系统和自行研制的GNSS定向仪设计出一套抗干扰能力较强的天文-GNSS组合定向系统;编写了一套具有快速解算定向结果、实时显示定向信息、记录分析定向数据等功能的GNSS定向软件以及方位角转换软件。实验结果表明,GNSS定向子系统能够快速初始化,同传统GPS定向仪相比,其初始化时间明显缩短,定向精度明显提高;而天文定向子系统定向精度远高于GNSS定向,两者优势互补,在外界环境复杂的地区有一定的应用价值。

With comparison to the high precision but strict weather requirements of astronomical orientation,GNSS orientation is not easily influenced by the weather.Based on these characteristics,this paper uses the Y/JGT-01 astronomical measurement system and GNSS self-developed directional system to design a set of astronomical-GNSS combination orientation system with strong anti-jamming capability.We compiled a set of GNSS directional system software and azimuth conversion software.This GNSS directional system software has the abilities of fast solving directional results,displaying real-time directional information,recording and analyzing data and other functions.Experimental results show that the GNSS direction subsystem is capable of fast initialization.Compared with traditional GPS direction finder,its initialization time was shortened significantly and directional precision was improved apparently.The accuracy of astronomical orientation subsystem is much higher than that of GNSS directional orientation.These two systems make up for each other and have a certain value in the complex external environment areas.