PDF (Last updated 2024/07/01)
Solar forcing = irradiance change /4 x (1-earth's albedo) = 0.175 x irradiance change (albedo of the Earth = 0.30)
PDF (Last updated 2024/07/01)
Data source
1976/01/05 to 2003/02/28 Physikalisch Meteorologisches Observatorium Davos, World Radiation Center
2003/03/01 to 2020/02/25 University of Colorado Solar Radiation & Climate Experiment. Data are matched using the 2003/03/01 to 2004/02/29 period.
The above web page writes, "End of Operations (25 Feb. 2020): The SORCE instruments and spacecraft were powered off on 25 Feb. 2020, ending a very successful 17-year mission."
2018/01/11 to 2024/06/26: GES DISC
Sunspots WDC-SILSO, Royal Observatory of Belgium, Brussels Note from SILSO: Since July 1st 2015, the original Sunspot number data are replaced by a new entirely revised data series. On this occasion, the data are presented in a new array of files, containing additional values that were not present in the original series. For proper tracking of those changes, the present version is numbered 2.0. (Data are through June 2024, Last modified: 2024/07/01)