Study of generating mechanism of ionospheric E-region irregularities with rocket/radar simultaneous observations

火箭/雷达同步观测电离层E区不规则性产生机制研究

基本信息

批准号：
14340145
负责人：
FUKAO Shoichiro
金额：
$ 9.22万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

Ionospheric irregularities in the mid-latitude E-region has been a study topics for more than ten years. The epoch was the discovery of the quasi-periodic (QP) structure in the E-region FAI (Field-Aligned Irregularity) echoes observed with the MU radar in Japan. The QP structures appear in the E-region FAI as a reflection of modulation pattern in the Sporadic-E (Es) layers. The structures are associated with polarization electric field, which suggests strong coupling process between the ionized and neutral atmosphere. In August 2002, we conducted SEEK-2 (Sporadic-E Experiment over Kyushu 2) campaign in Japan under collaboration with scientists from Japan, USA and Taiwan. The SEEK-2 consists of two sounding rockets of Institute of Space and Aeronautical Sciences that include in-situ experiment of electron density, electron temperature, electric field, plasma fluctuation and waves, and geomagnetic field as before. This research program is mainly dedicated to conduct the SEEK-2 ground-based observations. We operated two radars of 24.5 MHz and 31.6 MHz, ionosonde network of Japan, an MF radar, several airglow imagers, and a GPS scintillation-receiver system. We observed intense QP echoes with radars after 23 LT (= UT + 9 hours) on August 3, 2002, and launched rockets into the E-region at 2324 LT and 2339 LT. The operation of the SEEK-2 was very successful as we could, select a good event for the launches. All instruments on the rockets worked fine. We have found that the rockets detected multi-layered Es-layers at 103, 105 and 129 km altitudes, and intense electric fields that approach +-10 mV/m. In March 2003, we hosted the SEEK-2 workshop for data comparison and analysis. From this observation program we published more than 30 papers in the international journals. Numbers of oral presentations from the SEEK-2 results were 21 in international conferences, and 54 in domestic meetings.

中纬度电子区域中的电离层不规则性已成为研究主题已有十多年了。该时期是在日本观察到的E-Region FAI（现场对齐的不规则性）回声的E-Griodic（QP）结构的发现。 QP结构出现在电子区域FAI中，作为散发性层中调制模式的反映。结构与极化电场有关，这表明离子化和中性气氛之间的强耦合过程。 2002年8月，我们在日本与日本，美国和台湾的科学家合作进行了Seek-2（对九州2的零星实验）。 Seek-2由两个声音和航空科学研究所的火箭组成，其中包括电子密度，电子温度，电场，等离子体波动和波浪的原位实验，以及以前的地磁场。该研究计划主要致力于进行SEEK-2地面观测。我们操作了两个24.5 MHz和31.6 MHz的雷达，日本的Ionosonde网络，一个MF雷达，几个气格成像器和GPS闪烁接收器系统。我们观察到2002年8月3日23 LT（= UT + 9小时）后用雷达的激烈的QP回声，并在2324 LT和2339 LT上发射了火箭。 Seek-2的操作非常成功，为发布会选择一个好的活动。火箭上的所有乐器都可以正常工作。我们发现，火箭在103、105和129 km的高度检测到多层ES层，以及接近-10 mV/m的强烈电场。 2003年3月，我们主持了SEEK-2研讨会，以进行数据比较和分析。从这个观察计划中，我们在国际期刊上发表了30多篇论文。 Seek-2结果中的口头介绍数量为21个国际会议，在国内会议上有54个。