INTERNATIONAL   EARTH   ROTATION   SERVICE   (IERS) 
                    SERVICE INTERNATIONAL DE 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, 18 November 1998


                                                   Bulletin D 78










                               ANNOUNCEMENT OF DUT1




        From the


                               01 January 1999, 0h UTC


    until further notice, the value of DUT1 to be disseminated with the 
    time signals will be




                                  DUT1 = + 0.7 s
                                  



        Bulletin D 79 should be issued in January 1999.
         

         

        The change of sign is due to the introduction of a leap second.