Retraction notice to: An agile high-frequency radar used for ionospheric research

Abstract

Refers to RETRACTED: An agile high-frequency radar used for ionospheric research, Jingye Yan, Ailan Lan, Xiang Deng, Jiaojiao Zhang, Chi Wang, and Hongbin Qiu, J. Space Weather Space Clim., Volume 11, Article Number 25, 2021, Published online: 23 March 2021 https://doi.org/10.1051/swsc/2021010 This article is retracted at the request of the Editors-in-Chief and the Publisher. The paper “An agile high-frequency radar used for ionospheric research” published in the Journal of Space Weather and Space Climate (https://doi.org/10.1051/swsc/2021010) has overlapping content with papers published in Polar Science (https://doi.org/10.1016/j.polar.2020.100595) and Radio Science (https://doi-org.insu.bib.cnrs.fr/10.1029/2020RS007138).