Electron density and plasma waves in mid-latitude sporadic- E layer observed during the SEEK-2 campaign
Electron density and plasma waves in mid-latitude sporadic- E layer observed during the SEEK-2 campaign
复制标题
SEEK-2 活动期间观测到的中纬度零星 E 层的电子密度和等离子体波
DOI：
10.5194/angeo-23-2335-2005
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发表时间：
2005
影响因子：
1.9
通讯作者：
P. Bernhardt
中科院分区：
文献类型：
--
作者：
M. Wakabayashi;T. Ono;H. Mori;P. Bernhardt
抽象的。SEEK-2活动于2002年8月3日在日本九州岛上空进行，使用了S310-31和S310-32两枚探空火箭。本次活动计划阐明准周期回波（QPE）的产生机制与中纬度零星的E（Es）层。用两枚火箭上的阻抗探针成功地测量了Es层的电子数密度。在S310-32火箭上也观测到了VLF和ELF范围内的等离子体波。电子密度测量结果表明，在10 km左右的高度，沿着火箭轨道的Es层有一个或两个主峰。在90 ~ 120 km的高度范围内，主要Es层有一些较小的峰。在SEEK-2活动期间，这些密度峰值分布范围很广。Es层结构也通过使用固定偏置探针（FBP）测量，其具有数米的高空间分辨率（阻抗探针具有约400 m的高度分辨率）。通过与双频信标仪测量的总电子含量（TEC）的比较，发现Es层在水平方向上也受到调制，其尺度为30-40 km。结果表明，地面相干雷达观测到的QP回波来自Es层的主密度峰。等离子体波仪器检测到与TMA释放操作相关的VLF和ELF等离子体波的增强，并且还与Es层的通过相关。关键词电离层（电离层不规则性;中纬度电离层;等离子体温度和密度）
Abstract. The SEEK-2 campaign was carried out over Kyushu Island in Japan on 3 August 2002, by using the two sounding rockets of S310-31 and S310-32. This campaign was planned to elucidate generation mechanisms of Quasi-Periodic Echoes (QPEs) associated with mid-latitude sporadic-E (Es) layers. Electron number densities were successfully measured in the Es layers by using the impedance probe on board two rockets. The plasma waves in the VLF and ELF ranges were also observed on board the S310-32 rocket. Results of electron density measurement showed that there were one or two major peaks in the Es layers along the rockets' trajectories near the altitude of about 10km. There were some smaller peaks associated with the main Es layers in the altitude range from 90 to 120 km. These density peaks were distributed in a very large extent during the SEEK-2 campaign. The Es layer structure is also measured by using the Fixed Bias Probe (FBP), which has a high spatial resolution of several meters (the impedance probe has an altitude resolution of about 400 m). The comparison with the total electron content (TEC) measured by the Dual Band Beacon revealed that the Es layer was also modulated in the horizontal direction with the scale size of 30–40 km. It was shown that the QP echoes observed by the ground-based coherent radar come from the major density peak of the Es layer. The plasma wave instrument detected the enhancement of VLF and ELF plasma waves associated with the operation of the TMA release, and also with the passage of the Es layers. Keywords. Ionosphere (Ionospheric irregularities; Midlatitude ionosphere; Plasma temeperature and density)
DOI：
10.5636/jgg.42.411
发表时间：
1990
期刊：
Journal of geomagnetism and geoelectricity
影响因子：
--
作者：
H. Oya;A. Morioka;Kaori Kobayashi;M. Iizima;T. Ono;H. Miyaoka;Toshimi Okada;T. Obara
通讯作者：
H. Oya;A. Morioka;Kaori Kobayashi;M. Iizima;T. Ono;H. Miyaoka;Toshimi Okada;T. Obara