Global ionospheric D-layer height monitoring
Global ionospheric D-layer height monitoring
复制标题
全球电离层D层高度监测
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Schlegel
中科院分区：
文献类型：
--
作者：
M. Füllekrug;A. Fraser;K. Schlegel
一个全球性的两个尺度高度电离层电导率分布推断从平均电磁波传播速度的七个地球电离层腔共振的频率范围内。对电磁波随时间变化的反射高度进行了逐日监测。这个D-层的高度表现出增加在太阳安静的条件下与减少电离在中间层高度从太阳短波辐射在太阳周期和太阳自转期间。结论是，它是可能的监测全球电离层D层高度变化与自然发生的电磁波在大气中。一个小型磁力计网络可以探测和定位南大西洋地磁场异常中的短寿命地外电离源造成的中间层电导率分布扰动的大规模偏远地区，这对航天器的运行是一个公认的危险。
A global two-scale height ionospheric conductivity profile is inferred from the mean electromagnetic-wave propagation velocities of seven Earth-ionosphere cavity resonances in the frequency range . The time-varying reflection height for the electromagneticwaves is monitored on a diurnal basis. This D-layer height exhibits an increase at solar quiet conditions associated with decreased ionisation at mesospheric altitudes from solar short-wave radiation during the solar cycle and the solar rotation period. It is concluded that it is possible to monitor the global ionospheric D-layer height variability with naturally occurring electromagnetic waves in the atmosphere. A small network of magnetometers may detect and locate large-scale remote areas of mesospheric conductivity profile perturbations from short-lived extraterrestrial ionisation sources in the South Atlantic geomagnetic field anomaly, which are an appreciated hazard to spacecraft operation.