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Comparison of GONG and MDI solar p-mode background

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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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  1. National Solar Observatory, P.O. Box 26732, Tucson, AZ, 85726-6732, USA

    C. Barban & F. Hill

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  1. C. Barban
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  2. F. Hill
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Barban, C., Hill, F. Comparison of GONG and MDI solar p-mode background. Solar Physics 220, 399–402 (2004). https://doi.org/10.1023/B:SOLA.0000031393.36840.7c

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  • DOI: https://doi.org/10.1023/B:SOLA.0000031393.36840.7c

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