Ed Davies:
Appendix A argues against putting the adjustment interval after the leap second (method 4a) by pointing out that some time signals contain announcements of the leap second before it happens but not after.
Rob Seaman:
Right, ...
Ed Davies:
I think a stronger argument against this method of adjustment is that during positive leap seconds UTC and UTC-SLS would be indicating different dates:
Rob Seaman:
This may be a fact - it does not itself constitute an argument. An argument would have to answer the question: So what?
You're right - I left the denouement implicit. With this method (4a) UTC-SLS would not have the property listed in section 3: "the time always equals UTC at full or half hours". I think this is a valuable property; as the text following the 4a), 4b) and 4c) options notes: "...would be reached at midnight, which is a time commonly used to schedule events and deadlines." I hope that makes sense. Ed.
