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Integrated Solar Disk Oscillation Measurements Using the Magneto-Optical Filter: Tests with a Two Station NetworkThe magneto-optical filter (MOF) was used to get high and intermediate l-modes of solar oscillations. For very low l-modes the imaging capability of the MOF is still attractive since it allows a pixel by pixel intensity normalization. However, a crude attempt to get very low l power spectra from Dopplergrams obtained at Mt. Wilson gave noisy results. This means that a careful analysis of all the factors potentially affecting high resolution Dopplergrams should be accomplished. In order to better investigate this problem, a nonimaging channel using the lock-in amplifier technique was considered. Two systems are now operational, one at JPL and the other at University of Rome. Observations in progress are used to discuss the MOF stability, the noise level, and the possible application in asteroseismology.
Document ID
19890016479
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cacciani, Alessandro
(Rome Univ. (Italy). California Inst. of Tech., Pasadena., United States)
Rosati, P.
(Rome Univ. (Italy). California Inst. of Tech., Pasadena., United States)
Ricci, D.
(Rome Univ. (Italy).)
Marquedant, R.
(Jet Propulsion Lab.)
Smith, E.
(Jet Propulsion Lab.)
Date Acquired
September 6, 2013
Publication Date
December 1, 1988
Publication Information
Publication: ESA, Seismology of the Sun and Sun-Like Stars
Subject Category
Solar Physics
Accession Number
89N25850
Distribution Limits
Public
Copyright
Other
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