INTERNATIONAL EARTH ROTATION SERVICE (IERS) SERVICE INTERNATIONAL LA ROTATION TERRESTRE BUREAU CENTRAL DE L'IERS OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. 33 (0) 1 40 51 22 26 FAX 33 (0) 1 40 51 22 91 Internet: iers@obspm.fr Paris, 19 October 1998 Bulletin D 77 ANNOUNCEMENT OF DUT1 From the 26 November 1998, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = - 0.3 s Bulletin D 78 should be issued in November 1998.