Bibcode
Henney, C. J.; Ulrich, R. K.; Bertello, L.; Bogart, R. S.; Bush, R. I.; Scherrer, P. H.; Cortés, T. Roca; Turck-Chièze, S.
Referencia bibliográfica
Astronomy and Astrophysics, v.348, p.627-635 (1999)
Fecha de publicación:
8
1999
Revista
Número de citas
16
Número de citas referidas
11
Descripción
The Global Oscillations at Low Frequency (GOLF) and the Michelson
Doppler Imager (MDI) instruments aboard the Solar and Heliospheric
Observatory (SOHO) give an excellent opportunity to search for solar low
frequency oscillation modes previously undetected from ground based
experiments. Presented here is a comparison of the velocity power
spectra between the two instruments. In addition, this paper outlines
work towards creating a GOLF-simulated signal utilizing MDI velocity
images. The simulation of the GOLF signal is achieved by integrating
spatially weighted masks with MDI full-disk Doppler images. The
GOLF-simulated signal and a selection of additional spatially masked MDI
velocity signals are compared with the observed GOLF signal for a 759
day period from May 25, 1996 through June 22, 1998. Ultimately, a
cross-analysis process between GOLF and MDI signals could lead to an
enhancement of our ability to detect low frequency solar oscillations.
For low degree (l<= 3) and low frequency acoustic modes, the
signal-to-background ratio between GOLF and the spatially masked MDI
velocity data is compared here.