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TWSTF (TW) is a precise time transfer technique and has being used to generate the TAI since 1999. From the beginning with only 3 measured points per week over a few baselines to now 12–24 points per day and measured as a worldwide network, the TW observable becomes highly redundant. However single baseline is still the only geometry in TAI time transfer practice. As shown in Fig. I-1, among the 35...
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