Articles | Volume 39, issue 2
https://doi.org/10.5194/angeo-39-369-2021
https://doi.org/10.5194/angeo-39-369-2021
Comment/reply
 | 
21 Apr 2021
Comment/reply |  | 21 Apr 2021

Comment on “Identification of the IMF sector structure in near-real time by ground magnetic data” by Janzhura and Troshichev (2011)

Peter Stauning

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Ann. Geophys. Discuss., https://doi.org/10.5194/angeo-2020-52,https://doi.org/10.5194/angeo-2020-52, 2020
Preprint withdrawn
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A critical note on the IAGA-endorsed Polar Cap (PC) indices: excessive excursions in the real-time index values
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Ann. Geophys., 36, 621–631, https://doi.org/10.5194/angeo-36-621-2018,https://doi.org/10.5194/angeo-36-621-2018, 2018
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Comments on quiet daily variation derivation in "Identification of the IMF sector structure in near-real time by ground magnetic data" by Janzhura and Troshichev (2011)
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Ann. Geophys., 31, 1221–1225, https://doi.org/10.5194/angeo-31-1221-2013,https://doi.org/10.5194/angeo-31-1221-2013, 2013

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Cited articles

Janzhura, A. S. and Troshichev, O. A.: Determination of the running quiet daily geomagnetic variation, J. Atmos. Sol.-Terr. Phys., 70, 962–972, https://doi.org/10.1016/j.jastp.2007.11.004, 2008. 
Janzhura, A. S. and Troshichev, O. A.: Identification of the IMF sector structure in near-real time by ground magnetic data, Ann. Geophys., 29, 1491–1500, https://doi.org/10.5194/angeo-29-1491-2011, 2011. 
Matzka, J.: PC_index_description_main_document_incl _Appendix_A.pdf, DTU Space web portal, available at: https://doi.org/10.11581/DTU:00000057, 2014. 
Nielsen, J. B. and Willer, A. N.: Restructuring and harmonizing the code used to calculate the Definitive Polar Cap Index, Report from DTU Space, available at: https://doi.org/10.11581/DTU:00000057, 2019. 
Stauning, P.: A critical note on the IAGA-endorsed Polar Cap index procedure: effects of solar wind sector structure and reverse polar convection, Ann. Geophys., 33, 1443–1455, https://doi.org/10.5194/angeo-33-1443-2015, 2015.  
Short summary
The commented publication by Janzhura and Troshichev (2011) constitutes an essential part of the basis for the IAGA endorsement by Resolution 3 (2013) of PC index calculations. However, there is strong disagreement between indications of near real-time methods in the title, abstract, statements in the text, and figure captions, as well as in illustrations of results in the article compared to results from recalculations of the relations by rigorous use of the presented near real-time procedure.