  Herein we adopt a multi-scale dynamical spectral analysis technique to
compare and study the dynamical evolution of the harmonic components of the
overlapping ACRIMSAT/ACRIM3, SOHO/VIRGO and SORCE/TIM total solar irradiance
(TSI) records during 2003.15 to 2013.16 in solar cycles 23 and 24. The three
TSI time series present highly correlated patterns. Significant power spectral
peaks are common to these records and are observed at the following periods:
0.070 year, 0.097 year, 0.20 year, 0.25 year, 0.30-0.34 year, 0.39 year. Less
certain spectral peaks occur at about 0.55 year, 0.60-0.65 year and 0.7-0.9
year. Four main frequency periods at 24.8 days (0.068 year), 27.3 days (0.075
year), at 34-35 days (0.093-0.096 year) and 36-38 days (0.099-0.104 year)
characterize the solar rotation cycle. The amplitude of these oscillations, in
particular of those with periods larger than 0.5 year, appears to be modulated
by the 11-year solar cycle. Similar harmonics have been found in other solar
indices. The observed periodicities are found highly coherent with the spring,
orbital and synodic periods of Mercury, Venus, Earth and Jupiter. We conclude
that solar activity is likely modulated by planetary gravitational and
electromagnetic forces acting on the sun. The strength of the sun's response to
planetary forcing depends non-linearly on the state of internal solar dynamics:
planetary-sun coupling effects are enhanced during solar activity maxima and
attenuated during minima.
