We find that signals from both MDI and GOLF are beneficial for detecting low degree () and low frequency ( µHz) acoustic modes. For the frequency range and the signals compared in this paper, the GOLF signal has the highest for acoustic modes. The of the GOLF and MDI central region masked signals is good for detecting acoustic modes. For modes, the central region masked signals have the highest of the power spectra compared in this paper. In addition, the of the preliminary GOLF-simulated signal, GOLF-sim, is found to be more similar to the GOLF signal than the MDI LOI-proxy signal without spatial masking for the modes investigated here. Future improvements of the GOLF-sim signal and the use of optimal mask for selected modes may be helpful in future cross-analysis between GOLF and MDI in the search for new low frequency modes.
© European Southern Observatory (ESO) 1999
Online publication: July 26, 1999