The IRIS network is now fourteen years old, and has continuously been taking data since 1989. The data analysis, which produced some noticeable scientifical results, like the measurement of the ell = 1 rotationnal splitting or the measurement of the solar acoustic cut-off frequency, was mainly performed with the summer campaigns data of 1989 to

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GOLF data continuously obtained over the last two years, provides a unique and ideal set for studying the low frequency (ν

Although the occasional malfunction of rotating polarizing elements at the beginning of the SOHO mission, which led to its stop, GOLF instrument has been performing precise and continuous measurements over the last two years. In this work, the nature of the actual GOLF measurement, two monochromatic intensities Ib+ and Ib- on the blue wing of the