Observations from GPS receivers and the Very Large Array (VLA) radio telescope recorded traveling ionospheric disturbances (TID) from underground nuclear explosions (UNEs), detonated in September 1992. The slant TEC (STEC) data derived from GPS observations were processed for all ray paths to isolate TIDs. For the TIDs from the Hunters Trophy test on 18 September 1992 and the Divider test on 23 September 1992, the propagated mean velocities of the TIDs were about 573m/s and 740m/s with standard deviations of 85m/s and 135 m/s, respectively. For the VLA observations, the spectral analysis produced three-dimensional fluctuation spectral cubes for the Hunters Trophy event. The arrival time of the TID at the VLA implied a propagation speed of 570-710 m/s. This study suggests the global availability of GNSS tracking networks and new low-frequency (VHF) radio telescopes may offer a method of UNE detection and characterization, which could complement the International Monitoring System (IMS).
翻译:从全球定位系统接收器和甚大射线(VLA)射电望远镜观测到的全球定位系统观测结果和从地下核爆炸中记录到的电离层扰动(TID)于1992年9月被引爆。从全球定位系统观测得到的倾斜的TEC(STEC)数据对所有射线路径都进行了处理,以孤立TIDs。1992年9月18日的猎人轨道试验和1992年9月23日的分解试验显示的TIDs的传播平均速度分别为573米/秒和740米/秒,标准偏差分别为85米/秒和135米/秒。关于VLA的观测结果,光谱分析为Thunts Trophy事件产生了三维波谱立方块。在VLA的TID到达时间意味着570-710米/秒的传播速度。这项研究表明,全球导航卫星系统跟踪网络和新的低频射电望远镜可以提供一种UNE的探测和鉴定方法,这可以补充国际监测系统(IMS)。