Evaluation of a magneto-optical filter and a Fabry-Perot interferometer for the measurement of solar velocity fields from space

Details Evaluation of a magneto-optical filter and a Fabry-Perot interferometer for the measurement of solar velocity fields from space Evaluation of a magneto-optical filter and a Fabry-Perot interferometer for the measurement of solar velocity fields from space

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984sses.nasa..125r&link_type=abstract

In its Solar Seismology from Space. p 125-155 (SEE N85-25060 14-92)

Physics

Optics

4

Fabry-Perot Interferometers, Helioseismology, Magneto-Optics, Power Spectra, Solar Oscillations, Telescopes, Filtergrams, Optical Filters, Solar Velocity, Time Series Analysis, Velocity Measurement

Scientific paper

A program was developed to evaluate the performance of three different devices as possible space-borne solar velocity field imagers. Two of these three devices, a magneto-optical filter and a molecular adherence Fabry-Perot interferometer were installed in a newly-constructed observing system located at the 60-foot tower telescope at the Mt. Wilson Observatory. Time series of solar filtergrams and Dopplergrams lasting up to 10 hours per day were obtained with the filter while shorter runs were obtained with the Fabry-Perot. Two-dimensional k h-omega power spectra which show clearly the well-known p-mode ridges were computed from the time series obtained with the magneto-optical filter. These power spectra were compared with similar power spectra obtained recently with the 13.7-m McMath spectrograph at Kitt Peak.

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