Autocorrelation analysis of MDI high-frequency data

T. Sekii, H. Shibahashi, A. G. Kosovichev

Research output: Contribution to journalConference articlepeer-review


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 v = 6.75mHz. The result is compared with a previous measurement.

Original languageEnglish (US)
Pages (from-to)385-388
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number517
StatePublished - Feb 2003
Externally publishedYes
EventPIC7 - Geneva, Switzerland
Duration: Oct 30 2003Nov 3 2003

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


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