Autocorrelation analysis of MDI high-frequency data

Details Autocorrelation analysis of MDI high-frequency data Autocorrelation analysis of MDI high-frequency data

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..385s&link_type=abstract

In: Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002,

Computer Science

Data Analysis, Solar Atmosphere

Scientific paper

We have analyzed MDI data using time-distance autocorrelation function, in a high-frequency range above the acoustic cut-off frequency of the solar atmosphere. The MDI velocity, intensity and line-depth signals were looked at. The wave reflection rate at the photosphere has been found to be around 10 per cent for l = 125 and ν = 6.75mHz. The result is compared with a previous measurement.

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