NotePCSindexExamination-27-12-2021.pdf

The note discusses the differences between two Polar Cap South (PCS) index series both submitted from Arctic and Antarctic Research Institute (AARI) , St. Petersburg, Russia,. One PCS series is published via the AARI web portal https://pcindex.org while the other PCS series is distributed via the web portal http://isgi.unistra.fr of the International Service for Geomagnetic indices (ISGI). Both PCS series have been downloaded on 23 December 2021 for the comparisons. In principle, the two series should be identical. However, differences on the order of magnetic storm amplitude (>3 mV/m) have been detected and are reported in the present note.本研究简报探讨了两套极盖南（Polar Cap South, PCS）指数序列的差异，这两套序列均源自俄罗斯圣彼得堡的北极与南极研究中心（Arctic and Antarctic Research Institute, AARI）。其中一套PCS指数序列通过该研究中心的门户网站https://pcindex.org发布，另一套则通过国际地磁指数服务机构（International Service for Geomagnetic Indices, ISGI）的门户网站http://isgi.unistra.fr对外分发。本次比对所用的两套PCS指数序列均于2021年12月23日下载获取。理论上，两套序列应当完全一致，但本简报中检测到了幅值量级可达磁暴级别（>3 mV/m）的差异。