基于双模通信技术的GNSS地表位移解算精度分析

Accuracy Analysis of GNSS Surface Displacement Resolving Based onDual-mode Communication Technology

地质灾害监测中往往通过移动通信的方式将观测数据回传至服务器,数据传输方式比较单一,对于信号不稳定或灾害造成的信号中断问题难以解决。结合使用电台自组网通信技术与4G通信技术,研制具备双模通信方式的GNSS接收机,弥补单模通信的短板。在稳定区域搭建测试环境,以4G通信为基准,验证电台自组网通信方式的稳定性与可靠性。将基准站安装在稳定位置,分别在距离基准站1.5、3、5、6 km位置各安装一台GNSS接收机,各主机均开启电台与4G两路数据传输,验证电台数据传输质量随距离增大的衰减程度。根据测试结果,验证电台传输方式的适用场景及最佳组网距离。

In geological disaster monitoring,the observation data is often transmitted back to the server through mobile communication,and the data transmission mode is relatively single,the signal interruption problem caused by signal instability or disaster is difficult to solve.By combining radio station's Ad Hoc Network communication technology with 4G communication technology,a GNSS receiver with dual-mode communication mode is developed to compensate for the shortcomings of singlemode communication.Build a testing environment in a stable area,using 4G communication as a benchmark,to verify the stability and reliability of the radio station's Ad Hoc Network communication method.Install the benchmark station in a stable position,and install one GNSS receiver at a distance of 1.5,3,5,and 6 km respectively from the benchmark station.Each host should enable data transmission between the radio station and 4G channels to verify the degree of attenuation of the radio station data transmission quality with increasing distance.Based on the test results,verify the applicable scenarios and optimal networking distance of the radio station transmission method.