The MSU equivalent measures from HadAT2 are a composite of remotely sensed data that is then processed to be equivalent to HadAT2. Although justifiable, many of the decisions they have made are subjective and alternative choices could be made that would appear, at least initially, to be equally plausible. Final MSU equivalent measures for the monthly HadAT2 timeseries are available as well as a number of intermediate products required to produce these from the Temperature on Pressure Levels data.