Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

How can I get ERBE cloud radiative forcing?

Cloud radiative forcing (CRF) is not an ERBE parameter. However, it can be calculated from the ERBE scanner data set using the all-sky and the clear-sky parameters as the following:

Cloud Radiative Forcing = Clear-sky Flux - All-sky Flux

Cloud radiative forcing can not be calculated from the ERBE nonscanner data set due to the lack of clear-sky parameters.