On the Long-Term Consistency of the Magnetic H Component and K Indices at the Swider and Niemegk Observatories (1921-1975)

Details On the Long-Term Consistency of the Magnetic H Component and K Indices at the Swider and Niemegk Observatories (1921-1975) On the Long-Term Consistency of the Magnetic H Component and K Indices at the Swider and Niemegk Observatories (1921-1975)

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sunge...1b..37k&link_type=abstract

Sun and Geosphere, vol.1, no.2, p.37-41

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Scientific paper

The recently digitized hourly geomagnetic data of the Polish station Swider (geographical coordinates: 52 07° 0 N and 210 15° 0 E) for the whole interval of the registration (1921-1975) are compared with records of Niemegk and Rude Skov using the absolute values of the H component, Kp index and the local K and IHV indices derived from this component. Data of other stations as Wingst, Lové, and Honolulu are also quoted. We apply the correlative analysis and the wavelet technique with establishing of the significance levels of the resultant power spectra. Generally our analysis of the H absolute values and IHV indices shows the good quality of the Swider H component registration that agrees with the results of other stations at that time. A small inconsistency in the registrations during 1927-1928 and 1933 should be corrected. The local K indices at Swider observatory should be recalculated in the periods 1940-1956.5 and 1964.3-1970. The long-time Potsdam/Seddin/Niemegk data set from the first half of 20th century collected in WDCs should be improved in order to resolve them to the same level of registration. The method of improvement is proposed.

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