The graph below compares UAH, RSS and GISS US temperatures with the actual measured US HCN stations. UAH and GISS both have a huge warming bias, while RSS is close to the measured daily temperature data. The small difference between RSS and HCN is probably due to the fact that my HCN calculations are not gridded.
My conclusion is that RSS is the only credible data set, and all the others have a spurious warming bias.
It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are. If it doesn’t agree with experiment, it’s wrong.
– Richard P. Feynman