Initial observations of polar mesospheric summer echoes using the EISCAT Svalbard Radar
Initial observations of polar mesospheric summer echoes using the EISCAT Svalbard Radar
复制标题
使用 EISCAT 斯瓦尔巴雷达对极地中层夏季回波进行初步观测
DOI：
10.1029/2000gl003821
复制
发表时间：
2001
影响因子：
5.2
通讯作者：
J. Röttger
中科院分区：
文献类型：
--
作者：
C. Hall;J. Röttger
极地中层夏季回波（PMSE）已被观测到在不同的频率，从MF到UHF和在不同的纬度。在这里，我们报告的观测PMSE在斯瓦尔巴群岛（79°N）在500 MHz。虽然PMSE早些时候已经在VHF（特别是50 MHz左右）的高纬度上报告过，但迄今为止还没有在500 MHz这样的高频上报告过。此外，该观察结果代表了使用224 MHz和933 MHz之间的频率的第一个。PMSE散射机制仍然存在争议，并且肯定与频率有关：在500 MHz的新观测将有助于确定不同机制之间的过渡频率。
Polar Mesospheric Summer Echoes (PMSE) have been observed at various frequencies from MF to UHF and at various latitudes. Here, we report the observation of PMSE over Svalbard (79°N) at 500 MHz. Although PMSE have been reported earlier at such high latitude at VHF (notably around 50 MHz), they had hitherto not been reported at such high frequency as 500 MHz. Furthermore, this observation represents the first one using a frequency between 224MHz and 933MHz. The PMSE scattering mechanism is still open to debate and is certainly frequency dependent: the new observations at 500 MHz will help to identify the transition frequency between different mechanisms.