Advantages and disadvantages of satellite measurements of the total ozone at the wavelength of 9.59 mkm are considered. Investigations of the total ozone using ultra-violet ground-based/satellite and infrared satellite data of 1998 for Siberia are compared. The ultra-violet ground-based/satellite data are practically identical but the infrared data have the +20 D.u. bias and the correlation coefficient of 0.72. Assuming water vapor to be a possible reason of this discrepancy, we corrected the infrared satellite data using the NOAA HIRS information.