Polar Network Observation : Auroral & Magnetic Field Dynamics thermosphere

极地网络观测：极光

• 批准号: 05041057
• 负责人: HAYASHI Kanji
• 金额: $ 10.56万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05041057/
• 关键词: Ground based magnetometer network; Aurora network observation; STEP; Auroral imaging with all-sky TV camera; Monochromatic low light imaging; Canadian polar region; Greenland; Svalbard; オーロラ; 多点観測; カナダ極域; 地上磁場; 磁気嵐; パルセイティングオーロラ

In order to study precision dynamics of auroal disturbance, observation campaigns were carried out with network of all-sky TV cameras mainly in northern Canada and also in Greenland andin Svalbard for selected new moon periods of each winter during an international collaboration study period of Solar Terrestrial Energy Program (1991-1995, lately extended till 1997). CCD cameras with image-intensifier were operated at six to eight sites specifically in focus to the polar cap region in collaboration with participants from regional countries. On selected auroral spectral lines luminosity distribution along the meridian or monochromatic imaging for all-sky field of view were also observed at several key sites.Two dimensional extent of magnetic field disturbances were continuously observed though the STEP period with a combination system of fluxgate and induction magnetometers at 20 sites and at eight more sitesonly induction magnetometers were operated. Data list and summary plots of acquired data are accessible in the home page of "STEP Polar Network" from the Internet by "http : //hpgrl. grl. s. u-tokyo. ac. jp/".Some achievements and results from the observation are ;1. Quasi-periodic poleward motions of sun-aligned auroral arcs in the morning side polar cap are found predominant during periods of northward interplanetary magnetic field.2. High time resolution video data in the polar cap region indicates that auroal dynamics in the polar cap requires to be classified with a new framework including the rapid motion.3. Conjunction studies between the ground based network observation with high time resolution both for magnetic field and auroral imaging are effectively going on in combination with each other and will be more promising in the coming maximum years of satellite missions for the magnetospheric studies.

为了研究极光扰动的精确动力学，在日地能计划国际合作研究期间（1991-1995，最近延长到1997年），利用全天电视摄像机网主要在加拿大北方、格陵兰和斯瓦尔巴特群岛进行了观测活动，选择了每年冬季的新月期。与来自该区域各国的参与者合作，在六至八个地点使用了带有图像增强器的CCD摄像机，特别关注极冠区域。在选定的极光谱线上，沿着子午线的亮度分布或全天空视场的单色成像也在几个关键地点进行了观测。在STEP期间，在20个地点用磁通门和感应磁力仪的组合系统连续观测了磁场扰动的二维范围，在另外8个地点只使用感应磁力仪。数据列表和采集数据的汇总图可通过“http：//hpgrl. grl. S.东京大学。AC. jp/"。观察的一些成果和结果是：1.在行星际磁场北移期间，晨侧极冠中与太阳一致的极光弧的准周期性极向运动占主导地位.极冠区高时间分辨率的视频资料表明，极冠区的极光动力学需要用包括快速运动在内的新框架进行分类.高时间分辨率的磁场和极光成像地面网络观测之间的联合研究正在有效地相互结合，并将在未来磁层研究卫星任务的最高年中更有前途。

项目成果

K.Hayashi et al.: "Whistler mlde waves observed by MGF search coil magnetometer --Polarization and wave normal features of upstream waves near the bow-shock" Geophys.Res.Lett.21. 1907-1910 (1994)

K.Hayashi 等人：“MGF 搜索线圈磁力计观测到的惠斯勒 mde 波——弓激波附近上游波的极化和波法向特征”Geophys.Res.Lett.21。

N.Nishitani et al.: "Spatial temporal characteristics of gian andurations." Geophys. Res. Lett.21. 1673-1676 (1994)

N.Nishitani 等人：“gian andurations 的时空特征。”

M.Nishino et al.: "Low-latitude VLF hiss associated with the severe magnetic storm on October 19-21,1989." J.Geomag.Geoelctr.46. 193-204 (1994)

M.Nishino 等人：“低纬度 VLF 嘶嘶声与 1989 年 10 月 19 日至 21 日的严重磁暴有关。”

S.Kokubun et al.: "Large field events in the distant magnetotail during magnetic storms" J.Geomag.Geoelectr.(in press). (1996)

S.Kokubun 等人：“磁暴期间遥远磁尾中的大场事件”J.Geomag.Geolectr.（出版中）。

J.W.MacDougall et al.: "F region gravity waves in the central polar cap : Part 2,Convection and magnetic fluctuations." Geophys.Res.Lett.(in press). (1996)

J.W.MacDougall 等人：“中心极冠中的 F 区重力波：第 2 部分，对流和磁力涨落。”