On Fri 2015-03-06T21:37:42 -0700, Warner Losh hath writ: > So it isn't outside the realm of possibilities that you'd have people making > measurements > from the late 60's till 1972 using UTC (and yes, it did exist in a practical > form > before 1972, just not in the current form and the common usage often leaves > some > ambiguity between the actual, realized form as broadcast by WWV, or the > proleptic > form w/o leap seconds). Actual measurements from this time, though, were based > on something approaching the UTC as broadcast by WWV. Not sure how many data > sets from that time survive until today, and how many need to be converted > from that > to UT1 or UT2, but evidentially there's some...
Yes and yes, but these are specialty applications for specialty datasets which can only be reduced to a precise modern time scale if the original observations and equipment were meticulously calibrated. And then they must be reduced by going back to look at, e.g. https://plus.google.com/photos/112320138481375234766/albums/6078225731350227361 Please don't try to make this part of a General Timestamp API. Before 1972, for a general API, there is just UT. -- Steve Allen <[email protected]> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
