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High resolution power spectra of daily Zurich sunspot numbersHigh resolution power spectra of 77 years of Zurich daily sunspot numbers were computed using various lags and data point intervals. Major harmonic peaks of the approximately 124-month period showed up strongly as well as the 27-day solar rotational period.
Document ID
19730007113
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Euler, H. C., Jr. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 2, 2013
Publication Date
January 18, 1973
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-X-64718
Report Number: NASA-TM-X-64718
Accession Number
73N15840
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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