погружных решений точильщика
Time Scales: UT1, UTC, TAI, ET, TT, GPS time stjarnhimlen.se. The differences between GPS Time and International Atomic Time (TAI) and Terrestrial Time (TT), also know as Terrestrial Dynamical Time (TDT), are constant at the level of some tens of nanoseconds while the difference between GPS Time and UTC changes in increments of seconds each time a leap second is added to UTC time scale.