Physics
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996soph..167..125p&link_type=abstract
Solar Physics, Volume 167, Issue 1-2, pp. 125-143
Physics
9
Scientific paper
Analyses based on irradiance observations from space within the last one and a half decades have discovered variations in the entire solar spectrum and at UV wavelengths on time scales of minutes to decades. In this paper we analyze the distribution of the measuring uncertainties and daily fluctuations in total solar irradiance measured by the Nimbus-7/ERB and SMM/ACRIM I radiometers as a function of solar cycle. Changes in solar total irradiance and its surrogates shorter than the solar rotation have also been considered as ‘noise’ and have been removed from the data. Our results show that the noise (both instrumental and solar noise) changes as a function of the solar cycle, being higher during high solar activity conditions. The analysis of the scatter plot diagrams between the data and their standard deviation, the so-called ‘dispersion diagrams’, provides a useful tool to estimate and predict the time of solar maximum and minimum activity conditions.
Delache Philippe
Pap Judith M.
Vigouroux Anne
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