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Comment to: Troshichev, O. A., Janzhura, A. S., Stauning, P. (2006): Unified PCN and PCS indices: method of calculation, physical sense and dependence on the IMF azimuthal and northward components, J. Geophys. Res., 111, A05208, https://doi.org/10.1029/2005JA011402
  • Peter Stauning
Peter Stauning
Danish Meteorological Institute

Corresponding Author:[email protected]

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Abstract

In the publication Troshichev et al. (2006) on the Polar Cap (PC) indices, PCN and PCS, an error was made by using components of the Interplanetary Magnetic Field (IMF) in their Geocentric Solar Ecliptic (GSE) representation instead of the prescribed Geocentric Solar Magnetospheric (GSM) representation for calculations of index scaling parameters. The mistake has caused a trail of incorrect relations and wrong conclusions extending since 2006 up to now (2020) which should be discontinued, for instance, by issuing a corrigendum note from the authors. The present comment explains the error and discusses in an extended example its consequences for one of the publications that has referenced to the invalid scaling parameter set.