2009年1月5日廊坊OH气辉观测图像的谱分析  

Spectra of the OH Airglow Perturbation on 5 January 2009 at Langfang

作　　者：涂翠[1] 胡雄[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190

出　　处：《空间科学学报》2012年第6期824-828,共5页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(40774087;41104099);国家航天领域高技术课题共同资助

摘　　要：2009年1月5日在中国河北省廊坊市韩村镇(39.4°N,116.6°E)进行了中国首次中间层顶大气重力波成像观测实验,记录了近4 h的OH气辉辐射数据,给出了依据该数据计算所得的该时间段内廊坊韩村附近水平方向约185 km范围内的中间层顶OH气辉扰动的谱分析结果.所得到的传播方向确定的二维功率谱和角度谱揭示了该时间段内重力波活动的波长和传播方向分布特点,表明波长下限较短,西向传播分量明显大于东向分量.It is necessary to observe and analyze the characters of gravity waves to study their effect to upper and middle atmosphere. The first imaging observation experiment of the atmospheric gravity waves in the mesopause region in China with the all-sky OH band airglow CCD imager was made on 5 January 2009, at Hancun （39.4°N, I16.6°E）, Langfang, Hebei. Based on the nearly 4-hour data, we obtained the spectra of OH airglow perturbation during this time period, with a horizontal range of about 185 km centered around the observatory （at Hancun, Langfang）. The unambiguous power spectrum and angular spectrum method is approved by simulation. The parameters of three quasi-monochromatic gravity waves analyzed before agree with the unambiguous power spectrum. The unambiguous power spectrum and angular spectrum reveal the distribution of wavelengths and propagation directions of the gravity waves during the 4 hours： the lower limit of wavelength is short; the gravity waves propagate more westward than eastward. Compared with the results in other two papers, the directions are different in different sites even in the same season and similar altitudes, which may be related with the different sources of the gravity waves.

关 键 词：重力波 成像 OH 气辉 谱分析 

分 类 号：P353[天文地球—空间物理学]