摘要
分析了SLF频段大气噪声实际测量数据,推测了全球大气噪声分布特性。借鉴VLF频段大气噪声分析方法,对美国加利福尼亚大学建设的四个测试站测试数据和中国电波传播研究所在青岛、南极的测试数据进行了分析,给出SLF和ULF频段噪声电平随频率变化曲线和80Hz大气噪声预测分布,以及典型实测数据时域、频域波形。比较了同处于北纬中纬度地区的青岛和美国加州两者的实测数据,两地区的噪声谱基本一致,但青岛噪声略大,并分析了其中原因。发现南极噪声谱中存在舒曼谐振现象。
The measured data in the practice experiment are investigated and the global noise distribution is obtained. By using the same method that analyze VLF noise distribution to deal with the measured data of four zones by Stanford university and the measured data of Qingdao zone and Antarctic zone by CRIRP, the global noise distribution on SLF/ULF is derived. The noise level curve is also obtained with the frequencies and the global noise level distribution at 80 Hz, and shows a measured data curve and its spectrum curve with the time. The measured noise data of Qingdao zone are compared with the measured noise data of California zone in the same latitude zone, and the noise level at Qingdao are consistent with the California＇s, which shows that the Qingdao noise level is a little higher than the California＇s, and the season is analyzed. Otherwise, we found the Schumann resonances in the Antarctic noise spectrum at 9 Hz.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第4期773-778,814,共7页
Chinese Journal of Radio Science
