Scafetta argues that the total solar irradiance (TSI) measurements gathered by satellites since 1978 are flawed because the Space Shuttle Challenger disaster prevented the timely launching of the ACRIM 2 satellite, which he worked on, to replace ACRIM 1.
Scafetta developed Diffusion Entropy Analysis, a method of statistical analysis which distinguishes between Levy Walk noises and Fractional Brownian motion in complex systems [REF].