A new instrument for sounding the solar atmosphere

Details A new instrument for sounding the solar atmosphere A new instrument for sounding the solar atmosphere

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..243c&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

Sound

1

Magneto-Optical Filters, High-Frequency Acoustic Waves, Helioseismology

Scientific paper

A new instrument based on Magneto-Optical Filters (MOFs) (Cacciani et al., 1994) will be used to simultaneously map the line-of-sight velocity at two heights in the solar atmosphere. Simultaneous Doppler images of 5 arc-seconds resolution will be taken in the K I (7699 Å) and Na I D2 (5890 Å) lines, which are separated by a few hundred kilometers in the solar atmosphere (Grossman-Doerth, 1994). By cross correlating the signals of the K and Na channels we will be able to determine the travel time and thus the propagation speed of sound waves in the solar atmosphere. The experiment will be run at the South Pole during austral summer of 2002/2003.

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