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M. Hegde K.M. Hiremath Vijayakumar H. Doddamani 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2014
With high temporal resolution (12 s) of about two hours duration, data of a coronal hole structure in 171 Å, 193 Å and 211 Å taken from SDO/AIA images is considered for examination of oscillations. After estimating the total DN counts of a whole coronal hole structure in three wavelength bands, the resulting time series are subjected to FFT and wavelet analysis. Significant periods in all the three wavelength bands are detected that are mainly concentrated around 500 s as a fundamental mode and its odd (167, 100, 71, 56, 46, 39, 33, 29, 26, 24 s) harmonics. Computed phases in all the three wavelengths band are estimated to be constant. 相似文献
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高丽稳 《航空标准化与质量》2010,(1)
主要介绍了美国航空航天工业协会(AIA)编制的美国航空航天标准化战略报告的主要内容、相关结论与建议。 相似文献
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