• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ESA Symposium on European Rocket and Balloon Programmes and Related Research >OBSERVATION OF MESOSPHERE SUMMER ECHOES WITH CALIBRATED VHF RADARS AT LATITUDES BETWEEN 54°N AND 69°N IN SUMMER 2004
【24h】

OBSERVATION OF MESOSPHERE SUMMER ECHOES WITH CALIBRATED VHF RADARS AT LATITUDES BETWEEN 54°N AND 69°N IN SUMMER 2004

机译：2004年夏季夏季校园夏季回声观察校准的VHF雷达，004°N和69°N之间的校准VHF雷达

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

摘要

Mesosphere Summer Echoes (MSE) have been observed with 50-MHz VHF radars at middle (MSE) and polar latitudes (PMSE) for more than 20 years. The occurrence and seasonal variation of these radar echoes as well as their dependence on solar and geomagnetic activity are mostly studied basing on relative signal strength measurements (signal-to-noise ratios). The latitudinal dependence of the appearance and intensity of mesospheric summer echoes is still an open question as the widely used relative signal strength observations are determined by the atmospheric properties as well as by the individual radar characteristics. The use of absolutely calibrated echo powers allows a system in-depended comparison of mesospheric summer echoes observed at different sites by different systems. We present two different radar calibration methods. One applies a noise source to calibrate the receive path of the radar only, a second uses the radar signal itself to calibrate the complete transmitting and receiving path of the radar system. Both techniques and the same calibration hardware have been applied to the ALWIN VHF radar at Andenes/Norway (69°N), the ESRAD radar at Kiruna/Sweden (68°N) and OSWIN radar at Kuehlungsborn/Germany (54°N). The sensitivity of the different radar systems and the seasonal and diurnal variation of the occurrence of mesospheric summer echoes at different locations are discussed on the basis of radar backscatter cross-sections.
机译：在中间（MSE）和极地纬度（PMSE）中，介于50-MHz VHF雷达（PMSE）超过20年，观察了Mesosphere夏季回声（MSE）。这些雷达回波的发生和季节变化以及它们对太阳能和地磁活动的依赖性主要研究了基于相对信号强度测量（信噪比比）。由于广泛使用的相对信号强度观测，所态度的相对信号强度观察和各个雷达特性，所广泛使用的相对信号强度观察以及各个雷达特性确定的外观和强度的纬度仍然是一个开放问题。使用绝对校准的回声功率允许通过不同系统在不同部位观察到的Mesompheric夏季回声的系统依赖于延伸比较。我们提出了两种不同的雷达校准方法。一个应用噪声源仅校准雷达的接收路径，第二个使用雷达信号本身来校准雷达系统的完整发射和接收路径。两种技术和相同的校准硬件已经应用于Andenes / Norway（69°N）的Alwin VHF雷达，Kiruna /瑞典的Esrad Radar（68°N）和Kuehlungsborn /德国（54°N）的奥维林雷达。在雷达反向散射横截面的基础上讨论了不同雷达系统和季节性和季节和季节和昼夜变异的季节性和昼夜变化的敏感性。

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