These datasets were produced by the late Dr. Claus Fröhlich. There are no longer supported as discussed in Finsterle, W., Montillet, J.P., Schmutz, W. et al. The total solar irradiance during the recent solar minimum period measured by SOHO/VIRGO. 
;Sci Rep 11, 7835 (2021). https://doi.org/10.1038/s41598-021-87108-y. The algorithm is now completely different to perform the degradation-correction of the Level2 TSI observations.