Gerard Ashton ashtongj at comcast.net
Thu Aug 4 07:30:47 EDT 2011

It is not necessary, at least in the case of WWV and WWVB, to have special
equipment beyond a short wave radio to decode DUT1. It can be done by
ear. Timings of sun and star observations can be done with a hand-operated
stop watch to a precision of 0.1 s, the same precision as DUT1. (Not
to say there won't be personal errors in excess of 0.1 s, but those errors
will probably be well under 1 s.)

I suspect the other reasons to drop DUT1 will be persuasive, but the lack
of commercial decoders is not a valid reason to drop it.

Gerry Ashton

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