Abstract
Using the method of maximum entropy spectral analysis (MESA) by Burg and the least-squares linear prediction (lslp) (also calledFABNE) by Barrodale and Erickson, the spectra of geomagnetic indices Ap, AN, AS, AE, AU, AL, Dst and cosmic ray neutron intensity at Deep River are obtained for 1965 and 1969 from daily means and for longer periods from monthly means. A large number of peaks of periodicities from 2 days to several years is obtained, many of which are shown by all the indices. Some of these are probably harmonics of the 27 days solar rotation period and the 20–22 years double sunspot cycle period. Comparison is made with results of earlier workers who reported fewer peaks.
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Abdel-Wahab A and Goned A 1974Planet. Space Sci. 22 537
Akaike H 1969Ann. Inst. Stat. Math. 21 243
Anderson N 1974Geophysics 39 69
Angell J K and Korshover H 1964J. Atmos. Sci. 21 479
Barrodale I and Erickson R E 1980aGeophysics 45 420
Barrodale I and Erickson R E 1980bGeophysics 45 433
Behannon K W and Ness N F 1966 The design of numerical filters for geomagnetic analysis,Nasa Tech. Note TN D-3341, July
Bevington P R 1969Data reduction and error analysis for the physical sciences (New York: McGraw Hill) pp. 164–176
Blackman R B and Tukey J W 1958The measurement of power spectra (New York: Dover)
Burch J I 1973J. Geophys. Res. 78 1047
Burg J P 1967 Maximum entropy spectral analysis, Paper presented at the 37th meeting, Soc. of Explor. Geophys., Oklahama City, Oklahama, October
Burg J P 1972Geophysics 37 375
Chen W Y and Stegan G R 1974J. Geophys. Res. 79 3019
Cheronsky E J 1966.J. Geophys. Res. 71 965
Courtillot V and Le Mouël J L 1976J. Geophys. Res. 81 2941
Currie R G 1973Astrophys. Space Sci. 21 425
Currie R G 1974J. Geomagn. Geoelectr. 26 319
Currie R G 1976Astrophys. Space Sci. 39 251
Fraser-Smith A G 1972.J. Geophys. Res. 77 4209
Fraser-Smith A G 1973J. Geophys. Res. 78 5825
Gnevyshev M N 1967Sol. Phys. 1 107
Jensen O G and Ulrych T J 1973Astron. J. 78 1104
Johnston J 1960Econometric methods (New York: McGraw Hill) pp. 134–135
Kane R P 1977J. Geomagn. Geoelectr. 29 471
Kane R P 1979.J. Geophys. Res. 84 965
Kane R P and Trivedi N B 1982.Geophysics 47 1731
Marple L 1980IEEE Trans. Acoust., Speech, Signal Process. 28 441
Mayaud P N 1968 Indices Kn, Ks et Km 1964–1967, National Centre for Scientific Research, Paris
Mayaud P N 1970a.Ann. Geophys. 26 109
Mayaud P N 1970bAnn. Geophys. 26 313
Radoski H R, Fougere P F and Zawalick E J 1975J. Geophys. Res. 80 619
Russel C T and McPherron R L 1973J. Geophys. Res. 78 92
Shapley A H 1947Trans. Am. Geophys. Union 28 715
Sugiura M and Poros D J 1971 Hourly values of equatorial Dst for the years 1957 to 1970,GSFC publication X-645-71-278, July
Svalgaard L and Wilcox J M 1975Sol. Phys. 41 461
Ulrych T J and Bishop T N 1975Rev. Geophys. Space Phys. 13 183
Ulrych T J and Clayton R W 1976Phys. Earth Planet. Inter. 12 188
Waldmeier M 1966Astron. Mitt. Eid. Sternwarte Zurich 274 1
Yacob A and Bhargava B N 1968J. Atmos. Terr. Phys. 30 1907
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Kane, R.P. Power spectrum analysis of geomagnetic indices. Proc. Indian Acad. Sci. (Earth Planet. Sci.) 95, 1–12 (1986). https://doi.org/10.1007/BF03029168
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DOI: https://doi.org/10.1007/BF03029168