Comparison of GONG and MDI solar p-mode background
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.
- Publication:
-
Solar Physics
- Pub Date:
- April 2004
- DOI:
- 10.1023/B:SOLA.0000031393.36840.7c
- Bibcode:
- 2004SoPh..220..399B
- Keywords:
-
- Coherence;
- Phase Difference;
- Noise Component;
- Versus Power;
- Correlate Component