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, 23 June 1997
                                                        Bulletin D 69










                               ANNOUNCEMENT OF DUT1




         From the


                               01 July 1997, 0h UTC


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


                                  DUT1 = + 0.5 s


         Bulletin D 70 should be issued in July 1997.
         

         

         

         The change of sign is due to the introduction of a leap second.
         We apologize for the late announcement.