> Some term other than SI-based minute/hour/day is needed. As another
> has stated, unlike TAI or UTC, SI seconds can be observed in other
> reference frames. Also, the SI brochure says nice things about UTC,
> without explicitly incorporating it into SI. Thus it is not cleaar
> that an SI minute cannot contain 61 SI seconds.
>
> Solar days occurred before anyone was able to, or interested in,
> measuring them. Also, non-human animals and plants experience solar
> days without measuring them.
>
> Gerry Ashton
How about "earth day", "earth minute", and "earth second"?
Seems a nice parallel to "mars day", "mars minute", and "mars second"
that was used by JPL for the probe missions.
And instead of "universal time", we can call the earth-tracking time
scale "earth time".
-Tim Shepard
s...@alum.mit.edu
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