The "mean" in "Greenwich Mean Time" actually means "mean" (like, average). I did not know this!
To calculate GMT they took the position of the sun throughout the year and averaged it out to find the average solar noon in Greenwich and based the time on that!
To calculate GMT they took the position of the sun throughout the year and averaged it out to find the average solar noon in Greenwich and based the time on that!
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#geodesy is fun 🤯🌍📐
Let the outrage begin!
The so-called equation of time is (to a good approximation) a sum of two sine-like functions, one with half the period of the other. But they have different phases and amplitudes, so I think interference terms can skew the distribution.
Admittedly, in the equation of time case, the phase shift between the functions is only about 1%, so the difference is small
Mean = 0 by definition
Median = -39.8 sec
St. dev: 8 min, 50 sec
Variance = 78 min^2
Quartile 1: -6 min, 9 sec
Quartile 2: +4 min, 50 sec
IQR: 10 min, 59 sec
Max: +16 min, 32 sec, on Nov 1
Min: -16 min, 32 sec, on Feb 14
Technically. 😉
He also has a prohibition on capes, claiming "Gross, if you want that much fabric near your wrist, just wear sleeves"
It's British English - don't expect the spelling to have anything to do with pronunciation :)
Just consider the place names Fowey (Foy) and Mousehole (Mouzel)...
Greenwich A Bit Rude Time?
(This is the view from my window)
Mean is the function (N₁+...Nₓ)÷X. In this case, 6
Median the middle value of a set. this case, 4
Mode is the value that appears most. So in the set (2,2,3,4), the mode would be 2
I mean, if they haven't, I'm a little disappointed 🧐
Or risk Greenwich mean time.
Just WHERE did you go to school [if you did]?
1850 now in the USA isnt it?
What did you link it meant?
Learning new things is brainfood and some folks out there are starving theirs and it shows.🙂
(I guessed GMT stood for, like... General Mountain Time)
And that just sounds mean.
Time really IS money...🕔
Or just Time is Mean....pulling on our life like a cigarette or sand in an hour glass
But wait: the effects of the "analemma" mean that's only true about four days out of the year
We are *completely* out of touch with "natural" time
Brains are very often specifically dumb
Oh, I see.
… and Google would fall in line.
We were very forward-looking back then. Now not so much.
Elphaba:
Greenwich Time has always been a dick towards PST and MST.
The name fits as originally expected.
(I can’t tell if some folks on this thread actually are angry at each other or just joking, but who cares?)
Also, I was in it for the “mode” question.
It's very easy to get lost with all the stuff to do!
Ty !! 😁
(lovely bookshop nearby tho, still got some of the books I got there)
Average of position of Sun through-out the year, when Earth (like all planets and moons) has an elliptical orbit.
VERY interesting.
Both are mean.
(Not average of) sunrise/sunset middle of, but when the sun was measurably directly overhead, and the middle of all measure noon times.
ZULU
However if you correct someone on this they will not appreciate it very much.
The French were bitterly opposed to a global system that put the British at the centre.
https://en.wikipedia.org/wiki/Vienna_Standard_Mean_Ocean_Water
Greenwich bossy time.
Greenwich jerk time.
So it should really be: GAMBOSEOPT