Instituto Nacional de Pesquisas Espaciais (INPE), Divisão de Clima Espacial, Av. dos Astronautas, 1758, 12227-010 São José dos Campos, SP, Brazil.
Universidade Presbiteriana Mackenzie, Centro de Rádio Astronomia e Astrofísica Mackenzie, Rua da Consolação, 930, 01302-907 São Paulo, SP, Brazil.
An Acad Bras Cienc. 2022 Apr 29;94(suppl 1):e20210600. doi: 10.1590/0001-3765202220210600. eCollection 2022.
The ionospheric investigations have improved our understanding of the space weather role in the upper atmosphere conditions, particularly at higher latitudes where the geospace phenomena print their signatures. The simultaneous observations using multi-instruments have improved our knowledge of the coupling processes inside the ionosphere, and their connection with the magnetosphere and neutral atmosphere processes under the space weather phenomena. The ionosphere probing at EACF started on 1986 using an analogical very low frequency (VLF) system, and after the year 2004 using digital VLF system, global navigation satellite system (GNSS), riometers and Canadian digital ionosonde (CADI). This paper presents the different radio techniques that have been used at Brazilian Antarctic Station Comandante Ferraz (EACF) to characterize the ionospheric conditions, and the highlights of the studies using multi-instrument observations performed in the last few decades.
电离层研究提高了我们对上层大气条件中空间天气作用的认识，特别是在高纬度地区，那里的地球空间现象留下了它们的特征。使用多仪器进行的同时观测提高了我们对电离层内部耦合过程的认识，以及它们与磁层和中性大气过程在空间天气现象下的联系。EACF 从 1986 年开始使用模拟甚低频 (VLF) 系统探测电离层，2004 年后开始使用数字 VLF 系统、全球导航卫星系统 (GNSS)、斜向辐射计和加拿大数字电离层探测仪 (CADI)。本文介绍了在巴西南极站费拉兹指挥官 (EACF) 用于描述电离层条件的不同无线电技术，以及过去几十年使用多仪器观测进行的研究的重点。
