Forums > General Discussion   Shooting the breeze...

I'vs solved the problem NASA can't

Reply
Created by Carantoc 9 months ago, 3 Apr 2024
Carantoc
WA, 6890 posts
3 Apr 2024 6:43AM
Thumbs Up

So... NASA is gonna spend the next two years to come up with a system of measuring time on the moon.

Apparently they have already decided to not call it moon-time but Coordinated Lunar Time (LTC).

www.abc.net.au/news/2024-04-03/nasa-to-create-time-standard-for-the-moon/103661032

Other than the fact Coordinated Lunar Time should be CLT, they should just save their money (and time), because it's already been done;

Froth Goth
779 posts
3 Apr 2024 8:18AM
Thumbs Up




decrepit
WA, 12370 posts
3 Apr 2024 9:25AM
Thumbs Up

This is the problem.
"An Earth-based clock on the Moon would appear to lose on average 58.7 microseconds per Earth-day."

Time is relative, not universal, it depends on the speed you're going and the strength of gravity.

So the same atomic clocks we use on earth will be out of sync with one on the moon. gps navigation relies on this being accurate. I'll let the experts come up with a solution

Froth Goth
779 posts
3 Apr 2024 9:47AM
Thumbs Up

Wonder how long until rich chinese and indians with fake money start eating dark matter as a delicacy

www.abc.net.au/news/science/2018-11-29/atomic-clock-physics-relativity-satellite-geodesy-ytterbium/10553936

maybe i should be scurrying in the center of the earth for some rather then doing my annual tokay gecko hunt in the jungles of cagayan de oro




CH3MTR4IL5
WA, 790 posts
3 Apr 2024 11:16AM
Thumbs Up

Select to expand quote
decrepit said..
This is the problem.
"An Earth-based clock on the Moon would appear to lose on average 58.7 microseconds per Earth-day."

Time is relative, not universal, it depends on the speed you're going and the strength of gravity.

So the same atomic clocks we use on earth will be out of sync with one on the moon. gps navigation relies on this being accurate. I'll let the experts come up with a solution


Well if you're receiving a GPS signal you also have a time sync signal as part of the data packet. Why not just use that and run on earth time? Why need a standalone clock?

decrepit
WA, 12370 posts
3 Apr 2024 4:32PM
Thumbs Up

Select to expand quote
CH3MTR4IL5 said.. Well if you're receiving a GPS signal you also have a time sync signal as part of the data packet. Why not just use that and run on earth time? Why need a standalone clock?

Just running this randomly through my brain, not sure how relevant the below is.

Computers need an internal clock, maybe it's something to do with that.

The GPS signal has to be adjusted to UTC from earth clocks, space clocks run on their own time.

Once you're on the far side of the moon you get no earth gps signal, so you need the moon's gps signal.

Maybe they have to agree on a time sync period, so all clocks adjust simultaneously.

Way over my head I can't give a definite answer.

Carantoc
WA, 6890 posts
3 Apr 2024 5:47PM
Thumbs Up

Select to expand quote
CH3MTR4IL5 said..
...Why need a standalone clock?


The Soup Dragon is not in-sync with Earth clocks.

If you don't sync to moon time the Soup Dragon will visit the soup well to collect green soup and it will not even be the Clangers tea time.

Chaos will then reign for a 1,000 years.


remery
WA, 3240 posts
3 Apr 2024 5:57PM
Thumbs Up

"Atomic clocks are used onboard GPS satellites that orbit the Earth, but even they must be sent updates two times per day to correct the clocks' natural drift. Those updates come from more stable atomic clocks on the ground that are large (often the size of a refrigerator) and not designed to survive the physical demands of going to space."

I'm thinking one of those less stable atomic clocks could be set up for the moon, with updates taking over two seconds to arrive.

Or we could use NASA's Deep Space Atomic Clock ... www.nasa.gov/missions/tech-demonstration/deep-space-atomic-clock/five-things-to-know-about-nasas-deep-space-atomic-clock/

Froth Goth
779 posts
3 Apr 2024 6:30PM
Thumbs Up

Its always the bloody clangers tea time its like everytime he has a cup time stops



Subscribe
Reply

Forums > General Discussion   Shooting the breeze...


"I'vs solved the problem NASA can't" started by Carantoc