11 years of IRIS network exploitation

Details 11 years of IRIS network exploitation 11 years of IRIS network exploitation

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sf2a.conf..521f&link_type=abstract

SF2A-2002: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 24-29, 2002, Eds.: F. Combes and D. Barret,

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Scientific paper

IRIS, network of 6 stations of integrated sun heliosismic measures, began in 1989 and thus acquired a complete solar cycle of 11 years at the dawn of the 3rd millenium. Being never able to approach enough the crucial rate of 100% coverage, IRIS developed co-operations to exploit other complementary data, and became IRIS++. Having also developed an original method of partial covering of the gaps in the data, which exploits the characteristics of the signal in the Fourier space, the data base IRIS++ reaches finally rates of annual coverage of about 80 to 90%, at the price of some acrobatic treatments which received satisfactory solutions. The average frequencies and splittings of rotation obtained with these 11 years of data can shamelessly be compared with those of space instruments; the rotation, very fine measure which improves with integration time being even better measured by IRIS. If the other parameters of the p modes are less precisely measured by IRIS and if the g modes are inaccessible to it without real hope, alone the frequencies and splittings of the p modes largely justify the investment.

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