• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2011 >Double-probe Spaceborne Electric Field Sensor for Earthquake Precursor Detection in Ionosphere
【24h】

Double-probe Spaceborne Electric Field Sensor for Earthquake Precursor Detection in Ionosphere

机译：用于电离层地震前兆检测的双探头星载电场传感器

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Electric field abnormal is one of the most important earthquake precursor phenomena in the ionosphere. The ionosphere electric field abnormal has the characteristic of wide frequency band (frequency range from DC to several MHz), which is suitable to be detected by the double-probe spaceborne electric field sensor (DSEFS). The DSEFS is composed of four sensing probes, four booms outside of the satellite and one signal acquisition and processing system ( SAPS ) inside the satellite. The four booms are used to set the four probes away form the satellite platform and form a tetrahedron in the space. The plasma potential around the probe is coupled to the probe though equivalent resistor and capacitor in parallel, which is the result of the probe charging. The plasma potential is acquired with a preamplifier with very high input impedance in the probe, In order to insure the detection precision, the value of equivalent resistor can be adjusted with a bias current provided by the SAPS. The probe potential is further acquired and processed by the SAPS to form three dimensional orthogonal electric field detection results, In order to insure the detection precision of the plasma electric field, the Spacecraft and Plasma Interaction System (SPIS) simulation software was used to simulate the interaction between satellite, sensor probes, booms and surrounding plasma. There are two major contributions in the paper. Firstly the layout of the sensor probes outside the satellite was optimized to reduce the influence of wake effect. Secondly, the fixing mode between the boom and satellite was optimized to reduce the influence of satellite potential change on the probe charging characteristic.
机译：电场异常是电离层中最重要的地震前兆现象之一。电离层电场异常具有频带宽（频率范围从DC到几MHz）的特性，适合用双探针星载电场传感器（DSEFS）进行检测。 DSEFS由四个传感探头，卫星外部的四个吊杆和卫星内部的一个信号采集与处理系统（SAPS）组成。四个吊杆用于将四个探测器从卫星平台上移开，并在空间中形成四面体。探针周围的等离子电势通过等效的电阻器和电容器并联耦合到探针，这是探针充电的结果。用探头中具有很高输入阻抗的前置放大器获取等离子体电势。为了确保检测精度，可以使用由SAPS提供的偏置电流来调整等效电阻器的值。通过SAPS进一步获取并处理探针电位，以形成三维正交电场检测结果，为了确保等离子体电场的检测精度，使用了航天器和等离子体相互作用系统（SPIS）仿真软件来模拟探针电场。卫星，传感器探头，喷杆和周围等离子体之间的相互作用。本文有两个主要贡献。首先，优化卫星外部传感器探头的布局，以减少唤醒效应的影响。其次，对动臂与卫星之间的固定方式进行了优化，以减少卫星电势变化对探头充电特性的影响。

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