The developments of space-time information certification system using VLBI correlation processing

我们已经开发了通过应用VLBI技术对GNSS信号进行相关处理来为公众用户认证时间和位置信息的技术。我们使用最先进的GPGPU软件成功地探测了几颗卫星的群延时条纹。根据从国际全球导航卫星系统(IGS)获得的群延迟和卫星轨道，我们使用新的处理软件估计了未知站点的位置。估计的地点位置与日本地理空间信息管理局(GSI)常规获得的位置一致，精度在2米以内。我们得出结论，VLBI技术适用于时间和位置信息的认证。

We have developed techniques to certify the time and position information for public users using correlation processing of GNSS signals by applying the VLBI technique. We succeeded to detect group delay fringes for several satellites using state-of-art GPGPU software. We estimated unknown site position using the new processing software based on the obtained group delays and satellite orbit derived from International GNSS Service (IGS). The estimated site position is consistent with that routinely obtained by the Geospatial Information Authority of Japan (GSI) within 2m accuracy. We concluded that the VLBI technique is applicable to certify time and position information.