Comparison of GONG and MDI solar p-mode background |
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Authors: | C Barban F Hill |
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Institution: | (1) National Solar Observatory, P.O. Box 26732, Tucson, AZ 85726-6732, USA |
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Abstract: | Using Severino's model, we estimate the amount of coherent correlated and uncorrelated background and incoherent noise components
needed to reproduce the following four helioseismic spectra: V power, I power, V–I phase difference and V–I coherence, using GONG and MDI data. We confirm that a coherent correlated component of 10-15% of the total background and
noise is needed in both V and I and that a larger amount of coherent uncorrelated background is needed for MDI data compared to GONG data to compensate for
a smaller incoherent noise. |
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Keywords: | |
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