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VIRGO (C.Frölich)

The uniquely stable environment on SOHO has enabled an understanding of long-timescale detector changes that have never been seen before. A very good understanding of the instrument has been established, enabling precise corrections of total irradiance values (long term stability likely within 100ppm).

Two VIRGO anomalies (latch-ups in the data handling system) have prompted some changes in the instrument monitoring.

Stein Vidar Hagfors Haugan
Mon May 7 14:37:27 EDT 2001