Based on the facility the lab owned , we analyze single error and region error and compare different gps precision . the results showed that the precision of gps agl32 is the highest , than are gps25 oem plate and map330 , and maps 15 with the lowest precision 针对实验室现有的设备，分别对单点定位误差和区域定位误差进行试验、分析，对不同gps使用精度进行比较。得出如下结论：农用差分gpsag132定位精度最高，其次为gps25oem板和map330 ，而map315最差。
How to reduce the influences of the location error of seismic station network and some other factors on the deviation of macroseismic and seismic epicentre , in this rapid service system of earthquake loss estimation , is the important condition of increasing the rationality of loss estimation results 在震害预测快速服务平台中，如何减少由于地震台网定位误差以及其它一些因素所造成实际的宏观震中与定位震中偏离的影响，是提高震害快速估计结果合理性的重要条件。
The experiments for operating vehicles demonstrate that the degree of accuracy and reliability of integrated navigation and positioning system , compared with gps / dr navigation and positioning system , is enhanced , vehicular operation efficiency and security are far and away strengthened and the thoroughfare capacity is improved . as consequence , traffic congestion can be moderated with effect and the automation of transportation management and the intelligence of the vehicular drive will be realized 汽车试验表明:采用地图匹配的方法来校正gps / dr的定位误差,其定位精度及可靠性比gps / dr定位有所提高,车辆运行效率和安全性也大大改善,提高了通行能力,有效地缓解了交通拥挤状况;从而为实现交通管理“自动化”以及车辆行驶“智能化”提供了技术支持。
The main tasks of this thesis are : discussing the dead - reckoning theory of doppler velocity log and compass , decreasing location error methods , emulating several ship tracks ; discussing several aspects influencing the velocity precision of doppler velocity log ; in a pool trial , processing the trial data and achieving some conclusions 本论文主要研究工作包括：对罗经和多普勒计程仪推算辅助导航系统的工作原理，及减小定位误差的两种方法和几种轨迹进行了研究；对影响多普勒计程仪测速误差的各个方面进行了综述；最后对多普勒计程仪水池试验的数据进行了处理，得出所要结论。
