The participating institutions each broadcast, in real time, a frequency signal with timecodes, which is their estimate of TAI.
ðə pɑːɹtˈɪsᵻpˌeɪɾɪŋ ˌɪnstɪtˈuːʃənz ˈiːtʃ bɹˈɔːdkæst, ɪn ɹˈiːəl tˈaɪm, ɐ fɹˈiːkwənsi sˈɪɡnəl wɪð tˈaɪmkoʊdz, wˌɪtʃ ɪz ðɛɹ ˈɛstᵻmət ʌv tˌiːˌeɪˈaɪ.