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抽水蓄能电站GNSS施工控制网设计与建立

抽水蓄能电站通常选址在高山谷底、人烟稀少的地区。工程区常植被茂密,通行、通视困难,采用常规方法建立施工控制网工作量大、施测困难。文章以辽宁抽水蓄  (本文共4页) 阅读全文>>

《卫星电视与宽带多媒体》2019年21期
卫星电视与宽带多媒体

三频GNSS精密定位理论与方法研究

如今,三频GNSS精密定位技术的应用范围不断扩大,已经成功应用于北斗系统。但是,相比而言,我国应用三频GNSS精...  (本文共2页) 阅读全文>>

《地球物理学报》2020年01期
地球物理学报

GNSS影像及其时空特征初探

地壳垂向形变在连续空间和时间域内呈现显著特征,探求其时空变化特征有助于理解地球物理过程,为研究地球内部相互作用机制提供支持.本文使用美国西部地区PBO与中国大陆CMONOC两个GNSS网测站的坐标时间序列,通过基于中位数并顾及年际差异的非参数方法(MIDAS方法)估计测站的速度与不确定性;建立空间结构函数(SSF)并确定区域内各测站间的相对关系;以此为基础,构建顾及空间结构的滤波器(MSF)以剔除粗差,增强区域共性;最后,基于MSF与图像处理技术对速度场进行空间加密,生成了研究区域空间内连续的地壳垂向形变图,即区域GNSS影像.随后,针对两个研究区域,分别利用MSF验证实验与棋盘格检测验证了GNSS成像方法的合理性及生成GNSS影像的可靠性;并通过对比使用顾及空间结构滤波前后的各测站速度与不确定性生成的GNSS影像,验证了顾及空间结构的滤波方法在...  (本文共17页) 阅读全文>>

《Chinese Journal of Electronics》2020年01期
Chinese Journal of Electronics

Survey of Performance Evaluation Standardization and Research Methods on GNSS-Based Localization for Railways

Global navigation satellite systems(GNSS) has been regarded as a key technology for train localization in the future, as GNSS-based localization can reduce the deployment of wayside equipment, and offer a high-accuracy determination in a cost effective way.However, the standardization of GNSS-based localization performance characteristics has not been done in railway.This can restrict the development...  (本文共12页) 阅读全文>>

《Chinese Journal of Electronics》2020年01期
Chinese Journal of Electronics

GNSS Fault Detection and Exclusion Based on Virtual Pseudorange-Based Consistency Check Method

Although there have been many implementations of Global navigation satellite system(GNSS)in rail transport systems, the integrity assurance of GNSS positioning is still not highly concerned by the users.Integrity is a significant issue for specific safety-relevant GNSS railway applications, especially the railway signaling system which requires a critical safety level. Classical integrity monitoring solutions require...  (本文共8页) 阅读全文>>

《Chinese Journal of Electronics》2020年01期
Chinese Journal of Electronics

Hazard Rate Estimation for GNSS-Based Train Localization Using Model-Based Approach

GNSS(Global navigation satellite system)has shown its ability on the non-safety relevant applications in various applications. In railway domain, safety is the utmost concern, GNSS-based train localization unit is the carrier of safe localization. EN 50126 standard specifies the electric and electronic system performance requirements as Reliability, availability, maintainability and safety(RAMS). Safety performance c...  (本文共8页) 阅读全文>>