• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Image Intensifiers and Applications; and Characteristics and Consequences of Space Debris and Near-Earth Objects >Infrasound from the El Paso superbolide of October 9 1997
【24h】

Infrasound from the El Paso superbolide of October 9 1997

机译：1997年10月9日的埃尔帕索（El Paso）超级遗骸的次声

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Abstract: During the noon hour on October 9, 1997 an extremely bright fireball (approximately $MIN@21.5 in stellar magnitude putting it into the class of a super-bolide) was observed over western Texas with visual sightings from as far away as Arizona to northern Mexico and even in northern New Mexico over 300 miles away. This event produced tremendously loud sonic boom reports in the El Paso area. It was also detected locally by 4 seismometers which are part of a network of 5 seismic stations operated by the University of Texas at El Paso (UTEP). Subsequent investigations of the data from the six infrasound arrays used by LANL (Los Alamos National Laboratory) and operated for the DOE (Department of Energy) as a part of the CTB (Comprehensive Test Ban) Research and Development program for the IMS (International Monitoring System) showed the presence of an infrasonic signal from the proper direction at the correct time for this super-bolide from two of our six arrays. Both the seismic and infrasound recordings indicated that an explosion occurred in the atmosphere at source heights from 28 - 30 km, having its epicenter slightly to the northeast of Horizon City, Texas. The signal characteristics, analyzed from approximately 0.1 to 5.0 Hz, include a total duration of approximately 4 min (at Los Alamos, LA) to greater than approximately 5 min at Lajitas, Texas, TXAR, another CTB IMS array operated by E. Herrin at Southern Methodist University (SMU) for a source directed from LA toward approximately 171 - 180 deg and from TXAR of approximately 321 - 4 deg respectively from true north. The observed signal trace velocities (for the part of the recording with the highest cross-correlation) at LA ranged from 300 - 360 m/sec with a signal velocity of 0.30 plus or minus 0.03 km/sec, implying a Stratospheric (S Type) ducted path. The dominant signal frequency at LA was from 0.20 to 0.80 Hz, with a peak near 0.3 Hz. These highly correlated signals at LA had a very large, peak to peak, maximum amplitude of 21.0 microbars (2.1 Pa). Our analysis, using several methods that incorporate various observed signal characteristics, total distance traveled, etc., indicates that the super-bolide probably had a source energy in the range between 10 - 100 tons (TNT equivlaent). This is somewhat smaller than the source energy estimate made using U.S. DoD satellite data (USAF news release, June 8, 1998). !5
机译：摘要：1997年10月9日中午，在德克萨斯州西部发现了一个非常明亮的火球（大约MIN@21.5，恒星大小，属于超级飞旋球），目击者从亚利桑那州到美国墨西哥北部，甚至在新墨西哥州北部超过300英里的地方。此事件在埃尔帕索（El Paso）地区产生了巨大的声音爆棚报告。它也是由4台地震仪在本地检测到的，这是德克萨斯大学埃尔帕索大学（UTEP）运营的由5个地震台站组成的网络的一部分。随后对LANL（洛斯阿拉莫斯国家实验室）使用的六个次声阵列的数据进行了调查，并作为美国能源部（CTB）全面禁止研究和开发计划（IMS）的一部分，为能源部（DOE）进行了操作（国际监测）系统）显示了在正确的时间在正确的时间存在来自我们六个阵列中的两个阵列中超音波的次声信号。地震和次声记录均表明，大气震源高度为28-30 km，发生了一次爆炸，震中位置略微位于德克萨斯州地平线市的东北部。从大约0.1到5.0 Hz的信号特性进行分析，包括大约4分钟的总持续时间（在洛杉矶洛斯阿拉莫斯），在德克萨斯州拉贾塔斯市TXAR，E。Herrin运营的另一台CTB IMS阵列的总持续时间超过大约5分钟。南部卫理公会大学（SMU）分别从洛杉矶向着大约正北的171-180度方向和从TXAR大约321-4度的方向发出信号。在LA处观察到的信号迹线速度（对于记录中具有最高互相关的部分）范围为300-360 m / sec，信号速度为0.30 +/- 0.03 km / sec，这意味着平流层（S型）风管路径。 LA处的主导信号频率为0.20至0.80 Hz，峰值接近0.3 Hz。在洛杉矶，这些高度相关的信号具有非常大的峰到峰，最大振幅为21.0微巴（2.1 Pa）。我们的分析使用了几种结合了各种观察到的信号特征，行进总距离等的方法，表明超硫化物的能量来源可能在10-100吨（相当于TNT）之间。这比使用美国国防部卫星数据所做的能源估算要小（美国空军新闻稿，1998年6月8日）。 ！5

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号