Folks at the National Research Council in Ottawa responsible for CHU's broadcast have said that they would change the format for DUT1 should there be a change in the definition of UTC (or whatever a possible new time scale might be called). -- Richard Langley
----------------------------------------------------------------------------- | Richard B. Langley E-mail: l...@unb.ca | | Geodetic Research Laboratory Web: http://gge.unb.ca | | Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | | Fredericton? Where's that? See: http://www.fredericton.ca/ | ----------------------------------------------------------------------------- ________________________________________ From: LEAPSECS <leapsecs-boun...@leapsecond.com> on behalf of Tony Finch <d...@dotat.at> Sent: Monday, July 25, 2016 6:37 AM To: Tom Van Baak; Leap Second Discussion List Subject: Re: [LEAPSECS] Leap second to be introduced at midnight UTC December 31 this year Tom Van Baak <t...@leapsecond.com> wrote: > > Isn't the limit on DUTC 0.9s? So you can't have a leap second at the end > > of the month when | UT1 - UTC | < 0.1 > > Right, for LSEM to work, you'd have to extend the DUT1 limit a bit > beyond 0.9s. Historically, DUT1 has changed from 0.1s to 0.5s to 0.7s to > 0.9s, so I doubt 1.1s or 2.0s would be the showstopper. As I understand it the problem with |DUT1| > 0.9s is to do with radio signal compatibility, e.g. MSF only allows |DUT1| <= 0.8s +/- 0.05s http://www.npl.co.uk/upload/pdf/MSF_Time_Date_Code.pdf Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ - I xn--zr8h punycode Fisher, German Bight: South veering west or southwest, 3 or 4, increasing 5 at times. Smooth becoming slight, occasionally moderate later in Fisher. Showers, fog patches at first. Moderate or good, occasionally very poor at first. _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs