INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. 33 (0) 1 40 51 23 35 http://iers.obspm.fr email: services.iers@obspm.fr Paris, 16 February 2018 Bulletin D 137 ANNOUNCEMENT OF DUT1 From the 15 March 2018, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = +0.1 s Bulletin D 138 should be issued in July 2018 To unsubscribe: http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html