武汉中层大气中频雷达及其初步探测结果  

MESOSPHERIC MF RADAR IN WUHAN AND ITS PRELIMINARY OBSERVATION RESULTS

作　　者：李凤琴[1] 胡雄[1] 张冬娅[1] 张训械[1] 黄泽荣[1] 熊建刚[1] 曾桢[1] 

机构地区：[1]中国科学院武汉物理与数学所,武汉430071

出　　处：《空间科学学报》2002年第1期65-71,共7页Chinese Journal of Space Science

摘　　要：首先简要地讨论了武汉中频雷达观测原理和设备的组成．该雷达测量６０—１００ ｋｍ高度的大气风场和电子密度．风场采用分布天线测量技术和全相关分析方法得到，电子密度通过微分吸收和微分相位技术获得．初步观测结果表明：（１）武汉上空冬季６０－１００ｋｍ高度的纬向风多为西风，风速为３０－５０ｍ／ｓ。经向风速为１０—２０ ｍ／ｓ． 垂直风速较小，一般在５ ｍ／ｓ以内．（２）６０—１００ ｋｍ高度范围的大气风场和电子密度均有明显的日变化，风场在某些时段和高度区间有较强的风剪切出现．（３）８０ ｋｍ以上高度大气的风场和电子密度存在较明显的扰动现象，它可能与大气波动过程有关．The MF radar was installed and firstly used to observe the mesospheric electron wind and ionospheric density over Wuhan. In this paper, the principle and config- urations of the radar and its preliminary observations are presented. Providing the measurements of wind field and the electron density at height ranges from 60 to l00km, the radar is configured with Spaced Antenna Mode. The method of Full Correlation Analysis is applied to estimate the wind field, while the Differential Ab- sorption or Differential Phase Experiment technique is used to measure the electron density. The preliminarily observation results show that (1) the zonal wind usually is in west wind at Feb. 9, 200l, its value about 30-50m/s, while the meridional wind is about 10-20 m/s and vertical wind is weak with a speed is less than about 5m/s at 60-100km height over Wuhan. (2) There's obviously diurnal variation of wind field and electron density at 60-100 km, and a wind shear is occasionally observed. (3) there's obvious disturbance of the wind field in the mesosphere, which could be connected with the atmospheric waves.

关 键 词：中频观测雷达 中层大气 大气风场 电子密度 武汉市 

分 类 号：P171[天文地球—天文学]