1980, National Research Council (U.S.) Select Committee on the National Weather Service, Technological and Scientific Opportunities for Improved Weather and Hydrological Services in the Coming Decade, page 44, The ultimate limitation of radiosonde networks is the impracticality of global deployment. […] Although, in principle, satellite soundings should be able to match radiosonde accuracies, in practice, they have errors of at least twice those of radiosondes.
Source: wiktionary