Physics
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..195..433m&link_type=abstract
Solar Physics, v. 195, Issue 2, p. 433-437 (2000).
Physics
2
Scientific paper
Solar diameter measurements performed at Calern Observatory astrolabe during more than two solar cycles show variations at various time scales in a broad range. Due to seasonal effects and instrumental characteristics, the recorded data are not sampled uniformly and present some gaps during these years. This time series has been analyzed by means of a deconvolution of the window function, as an alternative method to the standard least square fits of harmonic functions. The results show an extremely important improvement of the power spectrum. Harmonic terms already found by other authors are confirmed but new frequencies are also revealed by this analysis.
Abdelatif Toufik
Borgnino Julien
Delmas Christian
Fossat Eric
Irbah Abdanour
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