Summary
The spectral analysis of samples of beating-type pc3 pulsations, recorded at the Budkov Observatory during the summer months of 1968 and 1969 was carried out in the frequency interval10 mHz<f<100 mHz. The average limits of the pulsation frequency range are roughly20 mHz<f<60 mHz. The centre of the occurrence frequency graphs for both components is at the frequency fg ≈41 mHz. The analysis of three separated daily intervals showed a very slight tendency to a systematic decrease in the frequency of the centre from the morning to the afternoon. The study of the sense of rotation of the pulsation disturbance vector in the (X, Y)-plane showed an overall predominancy of L over R-types during daytime, particularly during the morning.
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References
J. S. Mainstone, R. W. E. McNicol, D. R. Horgan: Magnetic Tape Recording at Very Slow Tape Speeds. Geomag. Res. Sect. Dep. of Phys. Univ. of Queensland, Brisbane, Australia, Tech. Rep. 2 (1962).
K. Dobeš, K. Prikner, J. Střeštík: Processings of Records of Rapid Variations of the Geomagnetic Field by Computer. Travaux. Inst. Geophys. Acad. Tchécosl. Sci. No 330, Geofysikální sborník 1970, Academia, Praha (in press).
J. A. Jacobs: Geomagnetic Micropulsations. Phys. and Chemistry in Space, 1, Springer-Vlg, Berlin-Heidelberg-New York 1970.
Y. Kato, M. Tanaka, Y. Sato: On the Characteristics of the Beating Type Geomagnetic Pulsations inPc3 Range. The Sci. Rep. Tôhoku Univ., 5-th Ser. Geoph., 19 (1967), 45.
T. J. Herron: An Average Geomagnetic Power Spectrum for the Period Range 4.5 to 12 900 Seconds. J. Geoph. Res., 72 (1967), 759.
K. Prikner: Rapid Changes in the Fourier Spectra ofPil Pulsations during Magnetically Disturbed Periods. Part I — Frequency Analysis. Studia geoph. et geod., 13 (1969), 276; Part II — Amplitude Analysis. Studia geoph. et geod., 13 (1969), 444.
H. Voelker: Observations of Geomagnetic PulsationsPc3, 4 andPi2 at Different Latitudes. Ann. Geophys., 24 (1968), 245.
T. Hirasawa, T. Oguti, T. Nagata: Dynamic Spectrum of Geomagnetic Pulsations at Low Latitude. Rep. of Ionosph. and Space Res., 19 (1965), 452.
J. S. Mainstone: The Frequency Spectra of Micropulsations Recorded at Stations in Eastern Australia. Final Rep. „A Study of Geograph. Distrib. of Geomag. Micropulsations”, Univ. Queensland, Nov. 1966, 48.
A. G. Kalashnikov, K. J. Zybin: Some Observational Results of the Variation of the Horizontal Component Vector of the Geomagnetic Field. IAGA Bull. 16c — Rapid Magnetic Variations, (1961), 41.
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Prikner, K., Střeštík, J. & Dobeš, K. Frequency analysis of geomagnetic beating-type pulsations in thepc3 range. Stud Geophys Geod 16, 262–270 (1972). https://doi.org/10.1007/BF01614052
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DOI: https://doi.org/10.1007/BF01614052