Relation between Changes in the Arctic Middle and Upper Atmosphere and Influences of Solar Particles

[极光区等离子体研究]挪威特罗姆斯皮大学与特罗姆斯皮大学极光天文台小组合作，自1993年以来一直对总电子含量（TEC）进行观测。TEC已获得从测量的GPS信号之间的传播时间延迟的两个载波的L1和L2，他们使我们有可能调查每天的TEC的变化。能谱的降水粒子已来自与EISCAT雷达在Tromsphi观测到的电子密度分布。从雷达获得的能量谱和直接观察到的DMSP卫星在接近雷达站点的路径之间的比较表明，使用EISCAT雷达的技术相当可靠。[极区中高层大气动力学和化学研究]本文用离子运动资料反演了E区热层风，并计算了E区热层风的温度场。 关于我们 n，电子密度和电场与EISCAT雷达观测。比较雷达观测得到的风在安静和扰动条件下显示出的差异，在风的周日和半日模式。本文从理论上研究了中高层大气水汽环流及与之相关的离子化学。【斯瓦尔巴特群岛IS雷达项目研究】与EISCAT科学协会在斯瓦尔巴特群岛IS雷达项目上的合作取得了进展。1994年8月31日至9月3日在日本举行的“日本-EISCAT极地电离层研讨会”的会议记录已于1995年出版。1995年，日本政府批准向国家极地研究所提供建造斯瓦尔巴特群岛雷达天线的财政支助。我们与NIPR合作，为日本加入EISCAT科学协会做准备。已开发了一个数据分析系统，用于处理全球定位系统TEC和EISCAT雷达的数据，数据库正在建设中。少

[Study on Plasma in the Auroral Region]Observation of total electron content (TEC) has been carried out since 1993 at University of Tromsphi, Norway under collaboration with the group of the Auroral Observatory, University of Tromsphi. The TEC has been obtained from measurement of difference in propagation time delays between GPS signals on the two carrier radio waves of L1 and L2, and they have made us possible to investigate day-to-day variabilities in TEC.Energy spectra of precipitating particles have been derived from the electron density profiles observed with the EISCAT radar at Tromsphi. Comparison between the energy spectra obtained from the radar and those directly observed with the DMSP satellite on the paths close to the radar site indicates a reasonably well reliablity of the technique using the EISCAT radar.[Study on Dynamics and Chemistry of the Middle and Upper Atmosphere in the Polar Region]Thermospheric winds in the E-region have been derived from the data of ion motio … More n, electron density and electric field observed with the EISCAT radar. Comparison of the winds obtained from the radar observations during both in quiet and disturbed conditions shows differences in winds of the diurnal and semi-diurnal modes. Circulation of water vapor and related ion chemistry in the middle and upper atmosphere have been theoretically studied.[Study on Svalbard IS Radar Project]Collaboration with the EISCAT Scientific Association on the Svalbard IS Radar Project has been made progressed. Proceedings of the 'Japan-EISCAT Symposium on the Polar Ionosphere' held in Japan on August 31-September 3,1994 have been published in 1995. Financial support by the Japanese Government for construction of an antenna of the Svalbard radar has been approved in 1995 to the National Institute of Polar Research. We have collaborated with the NIPR in preparation for the joining of Japan to the EISCAT Scientific Association. A data analysis system for processing the data of GPS-TEC and EISCAT radar has been developed and the database is under construction. Less