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- W38222783 abstract "Mean frequencies, amplitudes, and linewidths for the solar 5 min p mode oscillations of degree 0, 1, and 2 have been obtained from approx. 280 days of SMM-ACRIM total irradiance data. The frequencies are in good agreement with measurements obtained from velocity data. The amplitudes of the modes lie along a well defined envelope of power vs. frequency, which peaks at 3.1 mHz and has a width of 0.7 mHz (FWHM). The r.m.s. amplitude of the highest peak in the spectrum (n=21, l=1) is approx. 3 ppm of the total flux. The linewidths of the narrowest l=O modes are approx. 1 micro Hz (FWHM). A broad continuum of power caused both by solar surface granulation and by instrumental noise interferes with the analysis of 5 min modes. The continuum spectral power in a 1 micro Hz band near 3 mHz corresponds to an apparent r.m.s. variation of approx. 0.5 parts per million of the mean solar flux." @default.
- W38222783 created "2016-06-24" @default.
- W38222783 creator A5039083663 @default.
- W38222783 date "1984-12-15" @default.
- W38222783 modified "2023-09-23" @default.
- W38222783 title "Observations of Low-degree Modes from the Solar Maximum Mission (extended Abstract)" @default.
- W38222783 hasPublicationYear "1984" @default.
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