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.