[time-nuts] GPS disciplined Mars clock

For all those curious about all these weird and wonderful astronomical time scales this is a good start: http://arxiv.org/pdf/1005.4415v3.pdf ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

[time-nuts] GPS disciplined Mars clock

I found some test data and tried those values with my code. They agree to within a millisecond... and that difference is caused by my JD to Gregorian routine that adds a millisecond to the JD input to compensate for possible tiny double precision math errors... All of Lady Heather's times

Re: [time-nuts] GPS disciplined Mars clock

Calculator here http://astroutils.astronomy.ohio-state.edu/time/hjd2bjd.html Source code to do the conversion also on above site. You should just use their code as it is known correct . BJD (date/time at the center of the solar system) is actually very commonly used . It is the best way to

Re: [time-nuts] GPS disciplined Mars clock

Hi …. but what time is it on Titan :) Bob > On Jul 9, 2016, at 6:35 PM, Mark Sims wrote: > > I just added code to Lady Heather to calculate time in Terrestrial Time (TT) > and Geocentric Terrestrial Time (TCG). The difference is basically the time > dilation

Re: [time-nuts] GPS disciplined Mars clock

Hi Obviously time for a Kickstarter campaign to put a set of observatories on Mars …. Bob > On Jul 9, 2016, at 5:59 PM, jimlux wrote: > > On 7/9/16 1:40 PM, Joe Fitzgerald wrote: >> >> >> On 7/9/2016 3:00 PM, jimlux wrote: >>> >>> TAI my friend, TAI... >>> >> Hmm,

[time-nuts] GPS disciplined Mars clock

I just added code to Lady Heather to calculate time in Terrestrial Time (TT) and Geocentric Terrestrial Time (TCG). The difference is basically the time dilation effect of a time referenced to the center of the earth. Now I'm adding Barycentric Dynamic Time (TDB) which is TT referenced to

Re: [time-nuts] GPS disciplined Mars clock

On 7/9/16 1:40 PM, Joe Fitzgerald wrote: On 7/9/2016 3:00 PM, jimlux wrote: TAI my friend, TAI... Hmm, gravitational time dilation it might complicate things ... I suppose it depends on whether your Mars clock is on the surface of Mars, Earth or somewhere else. On 7/9/2016 3:34 PM, Hal

Re: [time-nuts] GPS disciplined Mars clock

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

Re: [time-nuts] GPS disciplined Mars clock

On 7/9/2016 3:00 PM, jimlux wrote: > > TAI my friend, TAI... > Hmm, gravitational time dilation it might complicate things ... I suppose it depends on whether your Mars clock is on the surface of Mars, Earth or somewhere else. On 7/9/2016 3:34 PM, Hal Murray wrote: > > How good is the data

Re: [time-nuts] GPS disciplined Mars clock

jfitzger...@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) --

Re: [time-nuts] GPS disciplined Mars clock

Joe Fitzgerald schrieb: > > What organization is in charge of inserting leap seconds into the > Martian time scale? IMRS - International Mars Rotation Service ;-) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] GPS disciplined Mars clock

On 7/9/16 9:23 AM, Mark Sims wrote: Do you have any equations for calculating Jovian (or Pluto) time and date from UTC / GPS / TAI time? Lady Heather does not want to slight any of our other potential planetary overlords (but could whip their bloated gaseous asses in a fight) I'm sure

Re: [time-nuts] GPS disciplined Mars clock

On 7/9/16 10:24 AM, Joe Fitzgerald wrote: What organization is in charge of inserting leap seconds into the Martian time scale? Inasmuch as there's no business concerns about noon being local solar noon, probably nobody.. TAI my friend, TAI...

Re: [time-nuts] GPS disciplined Mars clock

United Federation of Planets. Dick, W1KSZ -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Joe Fitzgerald Sent: Saturday, July 09, 2016 10:24 AM To: time-nuts@febo.com Subject: Re: [time-nuts] GPS disciplined Mars clock What organization is in charge

Re: [time-nuts] GPS disciplined Mars clock

What organization is in charge of inserting leap seconds into the Martian time scale? -Joe Fitzgerald KM1P --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ time-nuts mailing list --

Re: [time-nuts] GPS disciplined Mars clock

Hi You haven’t even scratched the surface yet …. What time is it on each of the moons? :) Bob > On Jul 9, 2016, at 12:36 PM, Mike Cook wrote: > > Calculating the local planetary time is fine for solid objects with an > accepted (or proposed) prime meridian , but I don’t

Re: [time-nuts] GPS disciplined Mars clock

I’ve often wondered how much sense it makes to speak of the rotational period of a gaseous planet. The different layers of the atmosphere potentially can have different rotational periods, and we can’t observe the actually rocky (or diamond, if you believe Arthur C. Clark) body at the center.

Re: [time-nuts] GPS disciplined Mars clock

> Le 9 juil. 2016 à 17:33, Scott McGrath a écrit : > > The Venusian's are feeling left out …. I guess it is possible as there is an agreed prime meridian even though we cannot see the central peak in the crater Ariadne in the visible spectrum. > > Content by Scott >

Re: [time-nuts] GPS disciplined Mars clock

Calculating the local planetary time is fine for solid objects with an accepted (or proposed) prime meridian , but I don’t think this is possible with gaseous objects where there is no fixed feature. > Le 9 juil. 2016 à 18:23, Mark Sims a écrit : > > Do you have any

Re: [time-nuts] GPS disciplined Mars clock

The Venusian's are feeling left out Content by Scott Typos by Siri > On Jul 9, 2016, at 2:58 AM, Mark Sims wrote: > > To appease our new (hopefully) benevolent Martian overlords, Lady Heather > can now work in Mars time... and I have it running right now while >

[time-nuts] GPS disciplined Mars clock

Do you have any equations for calculating Jovian (or Pluto) time and date from UTC / GPS / TAI time? Lady Heather does not want to slight any of our other potential planetary overlords (but could whip their bloated gaseous asses in a fight)

Re: [time-nuts] GPS disciplined Mars clock

On 7/8/16 11:58 PM, Mark Sims wrote: To appease our new (hopefully) benevolent Martian overlords, Lady Heather can now work in Mars time... and I have it running right now while connected to a Jupiter timing receiver. Now that Juno is getting ready to peer beneath Jupiter's clouds

[time-nuts] GPS disciplined Mars clock

To appease our new (hopefully) benevolent Martian overlords, Lady Heather can now work in Mars time... and I have it running right now while connected to a Jupiter timing receiver. - > Hmm. I have a SC-01.. One could hook it up to a Arduino trivially. And run it on Mars