...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Entropy mapping of the outer electron radiation belt between the magnetotail and geosynchronous orbit
【24h】

Entropy mapping of the outer electron radiation belt between the magnetotail and geosynchronous orbit

机译：熵的映射外电子辐射带磁尾和同步轨道

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

The specific entropy (entropy density) S is examined for the outer electron radiation belt at geosynchronous orbit and for the energetic electron population in the Earth's magnetotail. The outer electron radiation belt is measured with the SOPA detectors on board six geosynchronous satellites and the energetic electrons of the magnetotail are measured with instrumentation on board 12 Global Positioning Satellites (GPS) with a magnetic field model used to map the GPS orbit to the magnetotail. Density n and temperature T values are determined from relativistic Maxwellian fits to the electron measurements, enabling the specific entropy S to be calculated. For low temperatures the nonrelativstic specific entropy is S = T/n~(2/3); for a relativistic Maxwellian distribution a relativistically correct expression for S = S(T,n) is derived and used. The outer electron radiation belt at geosynchronous orbit local midnight (n ~ 3 X 1 0~(-4) cm~(-3) and T ~ 140 keV) and the energetic-electron population in the magnetotail (n~1 x 10~(-4) cm~(-3) and T~50 keV) statistically have the same specific entropy. Hence the two populations are probably the same. This implies adiabatic transport (1) from the magnetotail to the dipole (where the magnetotail electrons are the source of the outer belt) or (2) from the dipole to the magnetotail (where the magnetotail electrons are leakage from the radiation belt).
机译：特定的熵(熵密度)检查的外层电子辐射带地球同步轨道和精力充沛电子人口的地球磁尾。外层电子测量辐射带与SOPA探测器上6地球同步卫星和精力充沛电子测量磁尾的仪表上12个全球定位卫星(GPS)使用磁场模型GPS轨道映射到磁尾。n和温度T值确定相对论麦克斯韦适合电子测量,使熵的具体年代计算。nonrelativstic特定熵是S = T / n ~ (2/3);对相对论麦克斯韦分布相对论性地为S =正确的表达式年代的(T, n)派生和使用。辐射带在当地地球同步轨道午夜(n ~ 3 X 1 0 ~ ~(3)和(4)厘米T ~ 140凯文)和energetic-electron的人口磁尾(n ~ 1 x 10 ~(4)厘米~(3)和T ~ 50 keV)统计学上有相同的特定的熵。因此,两个种群可能是相同的。这意味着绝热运输(1)磁偶极子(磁尾的地方电子是带)或外的来源(2)从偶极磁尾(从磁尾电子泄漏辐射带)。

著录项

相似文献

  • 外文文献
  • 中文文献
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