A.V. Naumov Al’manac of Modern Metrology № 3 (8) 2016, pages 162–197 The article introduces the history of TWSTFT, describes the evolution of the method, its current performance and development prospects. Special attention is paid to improvements of modems` characteristics. Results of the application of methods in VNIIFTRI, calibration of channels of time comparison scales, … Continue reading Method of two-way transmission time and frequency signals via geostationary satellites (TWSTFT)