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Re: [time-nuts] GPS disciplined Mars clock

HM
Hal Murray
Sat, Jul 9, 2016 7:34 PM

What organization is in charge of inserting leap seconds into the Martian
time scale?

How good is the data on the rotation rate for Mars?  Is it good enough so
that they would need leap seconds?

How about leap years/days?  (assuming they have a calandar)

--
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jfitzgerald@alum.wpi.edu said: > What organization is in charge of inserting leap seconds into the Martian > time scale? How good is the data on the rotation rate for Mars? Is it good enough so that they would need leap seconds? How about leap years/days? (assuming they have a calandar) -- These are my opinions. I hate spam.
J
jimlux
Sat, Jul 9, 2016 9:53 PM

On 7/9/16 12:34 PM, Hal Murray wrote:

What organization is in charge of inserting leap seconds into the Martian
time scale?

How good is the data on the rotation rate for Mars?  Is it good enough so
that they would need leap seconds?

Very good. We can do two way Doppler from the Mars Rovers with an
accuracy in the mm/s range, and from that get a very good rotation rate.

How about leap years/days?  (assuming they have a calandar)

That would depend on whether the Martian year is an exact multiple of
the Martian sol (which I suspect it is not), and then, whether you want
your calendar to align with some astronomical event (e.g. a solstice).

https://en.wikipedia.org/wiki/Timekeeping_on_Mars

1 mars sidereal year = 668.5991 sols

On 7/9/16 12:34 PM, Hal Murray wrote: > > jfitzgerald@alum.wpi.edu said: >> What organization is in charge of inserting leap seconds into the Martian >> time scale? > > How good is the data on the rotation rate for Mars? Is it good enough so > that they would need leap seconds? Very good. We can do two way Doppler from the Mars Rovers with an accuracy in the mm/s range, and from that get a very good rotation rate. > > How about leap years/days? (assuming they have a calandar) > That would depend on whether the Martian year is an exact multiple of the Martian sol (which I suspect it is not), and then, whether you want your calendar to align with some astronomical event (e.g. a solstice). https://en.wikipedia.org/wiki/Timekeeping_on_Mars 1 mars sidereal year = 668.5991 sols