«MEAN SOLAR DAY»に関連する英語の本
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mean solar dayの使いかたを見つけましょう。
mean solar dayに関する本と英語文献で使われた文脈を提供するための簡単な抜粋文。
1
Family Magazine: Or Monthly Abstract of General Knowledge
But with a view to obviate this difficulty, an artificial solar day has been
constructed, called a mean solar day, the length of which is always the same, and
is the mean or average length of all the various apparent solar days in the course
of a ...
To get the concept how a mean solar day is of a longer time interval than the
sidereal To equinox time, let us study Fig. 1.34. Let C be the centre of the earth
and a flguinox 0 be the position of the observer at noon .' I of its meridian at the
date of ...
B.C. Punmia, Ashok Kumar Jain, Arun Kumar Jain, 2005
3
The Earth According to wikipedia:
Main article: Solar time § Mean solar time The average of the true solar day
during the course of an entire year is the mean solar day, which contains 86,400
mean solar seconds. Currently, each of these seconds is slightly longer than an
SI ...
4
Glossary of Mapping Science
The greatest deviation from a mean solar day is not quite a half-minute in either
direction. day, astronomic - SEE day, astronomical. day, astronomical - (1 ) A
solar day beginning at noon. Also called an astronomic day. It may be based
either ...
American Society of Civil Engineers, 1994
5
Elements of spacecraft design
These effects are all small, regular, and predictable; therefore, it is possible to
establish a mean solar day that has an invariant length. A mean solar day is
defined based on the assumptions that the Earth is in a circular orbit with period
exactly ...
6
American Edition of the British Encyclopedia: Or, Dictionary ...
As the earth describes an angle of 360° 59/, about its axis in a mean solar day of
24 hours, and an angle of 360° in a sidereal day, we say, as 360° 591 8' 2"' : 360°
: : 24b : 23>> 56' 4", the length of a sidereal day in mean solar time ; or the ...
7
Observing the Universe: A Guide to Observational Astronomy ...
These variations arise mainly from the tilt of the Earth's rotation axis, and from the
Earth's orbit being slightly different from circular; we will not go into details. By
contrast, the mean solar day is fixed in duration and equal to 24 hours. If solar
time ...
8
Discovering the
Solar System
By contrast, the mean solar day is defined to be fixed in duration, and has the
mean length of the solar days averaged over a year. If solar time and mean solar
time coincide at some instant, they will coincide again a year later, but in between
, ...
9
The TSQL2 Temporal Query Language
The daily fluctuations in the length of the apparent solar day can be "smoothed"
using a different method of measurement; this is the basis of the mean solar day.
Instead of measuring the apparent Sun, this clock measures an imaginary Sun ...
Richard T. Snodgrass, 1995
10
Encyclopedia of Microcomputers: Volume 19 - Truth ...
The daily fluctuations in the length of the apparent solar day can be "smoothed"
using a different method of measurement; this is the basis of the mean solar day.
Instead of measuring the apparent Sun, this clock measures an imaginary Sun, ...
Allen Kent, James G. Williams, 1996
用語«MEAN SOLAR DAY»を含むニュース項目
国内外の報道機関が語った内容や、次のニュース項目の文脈から
mean solar dayという用語がどのように使われているかを調べてみましょう。
Kilogram could get new accurate definition following breakthrough
A second was once worked out as a 'mean solar day' divided by 1/86,400. It is now calculated by measuring the oscillations of an atom of the ... «Daily Mail, 7月 15»
Monday's Editorials: Small leap for clocks, giant kick for nerds
Plus, one mean solar day is slightly longer than 24 hours, at 86,400 SI seconds. So to keep the two time sequences in sync, nerdy scientists ... «Edmonton Journal, 7月 15»
2015 Leap Second Causes Minor Disruption to Internet Services
... Earth's rotation around the sun and maintain synchronisation with UT1 solar time, which is determined by the duration of a mean solar day. «NDTV, 7月 15»
The man who's set to add a second to Spaniards' lives
So in 1967 the second stopped being defined as a mean solar day divided by 86,400 and instead came to be described by the International ... «EL PAÍS in English, 6月 15»
Why June 30 Will Be 1 Second Longer
Because of these planetary forces, a mean solar day likely hasn't lasted 86,400 seconds since about 1820, NASA scientists said. «Live Science, 6月 15»
NASA explains why June 30 will get extra second
However, the mean solar day - the average length of a day, based on how long it takes Earth to rotate - is about 86,400.002 seconds long. «Space Daily, 6月 15»
Emirates Metrology Institute to Add Leap Second to the UAE …
The variations in the Earth's rotation cause the mean solar day to diverge gradually from the extremely stable UTC time scale. To prevent this ... «Zawya, 6月 15»
Information & The Music of Your Life
... 30 to keep time in sync with the mean solar day, which measures the passage of time based on the sun's position in the sky, CBC News says. «kwoa, 6月 15»
About Time: Is the June 30th Leap Second the Last?
Historically, the second was defined as 1/86,400th (60 seconds x 60 minutes x 24 hours) of a mean solar day. We've actually been on an ... «Universe Today, 6月 15»
Marking time to stay connected
The modern second is, thus, 1/(24x 60x60) = 1/86,400 of the mean solar day and, in 1874, this was adopted as the unit of time for scientific ... «The Statesman, 6月 15»
