| タイトル | A search for periodic structure in solar 2 cm microwave radiation |
| 本文（外部サイト） | http://hdl.handle.net/2060/19730018093 |
| 著者（英） | Sentman, D. D. |
| 著者所属（英） | Iowa Univ. |
| 発行日 | 1973-05-01 |
| 言語 | eng |
| 内容記述 | A power spectral analysis of 285 hr of 2 cm microwave intensity data showed no statistically significant ( 96% confidence) periodicities in the frequency range 1 to 15 mHz. No correlation was found between 2 cm periodicities and solar activity in H alpha, X-ray, and several microwave frequencies. A small shift of power toward higher frequencies in the power spectrum of the 2 cm data was found to be correlated with solar H alpha and X-ray activity. Using the statistical properties of power spectra, an expression for the ratio of the minimum detectable peak-to-peak to ambient temperature at chromospheric heights may be derived. Applied to a model for oscillation bursts in quiescent supergranules, and using the most significant results of experiments to detect the microwave periodicities, this expression yields an upper limit of approximately .0015. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 73N26820
U-OF-IOWA-73-20
NASA-CR-133228 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/198686 |
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