Using the ECMWF Reanalysis v5 (ERA5) and the GNSS method as well as meteorological and observational data, the statistics of the PWV, TCC, SD, and other astroclimate indicators were obtained for a number of possible ESMT locations in the Russian Federation. These sites are compared with the Ali observatory in Tibet and the BTA location area. The first results of the GNSS PWV measurements on Mt. Kurapdag convincingly confirm the choice made earlier using the ERA5 data.