Author: Richard C. Willson,
Columbia University
ACRIM composite total solar
irradiance (TSI) time series are constructed using an optimum subset of results
from a 25-year series of satellite experiments and their overlapping
comparisons. A minima-to-minima TSI trend of + 0.04 %/decade is resolved during
solar cycles 21 to 23. The ACRIM composites use results from the Nimbus7/ERB,
ACRIM 1, 2 and 3 and VIRGO experiments as published by their science teams,
without modification.