Letter to the Editor
Improving the signal-to-noise ratio in solar oscillation spectra
R.A. García 1,2,
S.M. Jefferies 2,
C.G. Toner 2 and
P.L. Pallé 3
Received 30 April 1999 / Accepted 14 May 1999
We describe a data analysis technique for helioseismology that provides a reduction in the contamination of the solar oscillation spectrum from incoherent noise. We show that the technique allows: (i) a significant improvement in the signal-to-noise ratio for the modes in the oscillation power spectrum, and (ii) the solar velocity background spectrum to be observed at low frequencies using ground-based observations.
Key words: Sun: oscillations methods: data analysis
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© European Southern Observatory (ESO) 1999
Online publication: June 17, 1999