![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||
|
![]() | This article has been
mentioned by a media organization:
|
![]() |
Daily pageviews of this article
A graph should have been displayed here but
graphs are temporarily disabled. Until they are enabled again, visit the interactive graph at
pageviews.wmcloud.org |
The result of the move request was: Not moved. Jafeluv ( talk) 06:17, 24 April 2012 (UTC)
IERS Reference Meridian →
Prime Meridian – Prime Meridian is the
WP:COMMONNAME for this meridian. It is highly likely that most people searching for "prime meridian" are actually interested in the IERS Reference Meridian - this is the commonly used meridian on Earth. But the IERS name is not commonly used, except in very technical contexts.
The existing article
prime meridian contains generic details of what a prime meridian is, on Earth and on other planetary bodies, listing different ones that are, or have been, used. I am not proposing that this article be moved or renamed. Hatnotes or a dab page should link the two together.
As an alternative to moving this article, it could be merged into
prime meridian. Perhaps
Greenwich meridian should also be merged.
Bazonka (
talk)
17:17, 16 April 2012 (UTC)
A new paper REFUTES the INCORRECT claim, made in the "Location" section that:"The 5.3-arcsecond shift is a legacy of the first satellite navigation system, the Doppler based TRANSIT system." This paper is freely available - for abstract see http://link.springer.com/article/10.1007/s00190-015-0844-y. I will not repeat the conclusions of that paper other than to state that the shift is a result of the Deflection of the Vertical (DoV) (which I don't really understand). The authors of that (peer reviewed) paper explicitly refute the above claim; clear and strong evidence that it is WRONG. This article required correction. 173.189.72.141 ( talk) 15:52, 11 August 2015 (UTC)
The article is currently lacking a clear-complete-exact definition of the location of the IRM. Because the IRM is now rather virtual-technical (instead of being referenced to any current real spot on the earth surface), it may be too complicated etc to give an exact definition? Still, it would be good if knowledgeable folk would try...
The article states "IRM is the weighted average of the reference meridians of the hundreds of ground stations" but that seems over-simplified -- at the least, the IRM seems offset by some amount from this average? Offset by how much? When/how was this determined? Does the offset vary -- due to what? It goes on to say "stations' coordinates are adjusted annually". We are left with the clear-as-mud impression that all kinds of fudging are involved in these calculations, and we are left with no clear understanding of the basic concept at the root of defining an IRM in the context of the whole surface of the planet shifting around. I'm afraid we need a worked example of each tectonic plate shifting and rotation of specific amounts from one year to the next, and how the IRM location would then be determined.
Perhaps the whole technical discussion is only concerned with describing how the IRM location shifts over time, as opposed to where it was located to begin with. Leaving us wondering when in time and where in space the reference beginning was. Since there is an offset-error from Airy transit circle, that does not seem to be the exact origin -- yet the origin seems to somehow be connected/derived from that exact location, in some complicated way?
I am left disappointed, to not be able to find the exact story of how the reference-zero meridian for all world locations came to be located exactly wherever it is today. - 71.174.190.122 ( talk) 19:59, 22 December 2016 (UTC)
When one tries to click on the map to see more precisely where the Prime Meridian is, the larger map does not contain it. This is weird if you look at the article for the 180th meridian the map has the meridian nicely drawn on it. I have no idea how what is done here was even done, but the "blow up" lacks the meridian, which is the topic of the article, and the reason one would like to see the larger map. In other words: total fail. 2601:1C2:4C00:E7F:611B:2646:F190:3301 ( talk) 19:13, 2 January 2022 (UTC)
Changes to capitalization by Vic Park ( talk · contribs) are contested at Wikipedia talk:Manual of Style/Capital letters#Capitalization of equator and prime meridian. Jc3s5h ( talk) 18:45, 28 December 2022 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
![]() | This article has been
mentioned by a media organization:
|
![]() |
Daily pageviews of this article
A graph should have been displayed here but
graphs are temporarily disabled. Until they are enabled again, visit the interactive graph at
pageviews.wmcloud.org |
The result of the move request was: Not moved. Jafeluv ( talk) 06:17, 24 April 2012 (UTC)
IERS Reference Meridian →
Prime Meridian – Prime Meridian is the
WP:COMMONNAME for this meridian. It is highly likely that most people searching for "prime meridian" are actually interested in the IERS Reference Meridian - this is the commonly used meridian on Earth. But the IERS name is not commonly used, except in very technical contexts.
The existing article
prime meridian contains generic details of what a prime meridian is, on Earth and on other planetary bodies, listing different ones that are, or have been, used. I am not proposing that this article be moved or renamed. Hatnotes or a dab page should link the two together.
As an alternative to moving this article, it could be merged into
prime meridian. Perhaps
Greenwich meridian should also be merged.
Bazonka (
talk)
17:17, 16 April 2012 (UTC)
A new paper REFUTES the INCORRECT claim, made in the "Location" section that:"The 5.3-arcsecond shift is a legacy of the first satellite navigation system, the Doppler based TRANSIT system." This paper is freely available - for abstract see http://link.springer.com/article/10.1007/s00190-015-0844-y. I will not repeat the conclusions of that paper other than to state that the shift is a result of the Deflection of the Vertical (DoV) (which I don't really understand). The authors of that (peer reviewed) paper explicitly refute the above claim; clear and strong evidence that it is WRONG. This article required correction. 173.189.72.141 ( talk) 15:52, 11 August 2015 (UTC)
The article is currently lacking a clear-complete-exact definition of the location of the IRM. Because the IRM is now rather virtual-technical (instead of being referenced to any current real spot on the earth surface), it may be too complicated etc to give an exact definition? Still, it would be good if knowledgeable folk would try...
The article states "IRM is the weighted average of the reference meridians of the hundreds of ground stations" but that seems over-simplified -- at the least, the IRM seems offset by some amount from this average? Offset by how much? When/how was this determined? Does the offset vary -- due to what? It goes on to say "stations' coordinates are adjusted annually". We are left with the clear-as-mud impression that all kinds of fudging are involved in these calculations, and we are left with no clear understanding of the basic concept at the root of defining an IRM in the context of the whole surface of the planet shifting around. I'm afraid we need a worked example of each tectonic plate shifting and rotation of specific amounts from one year to the next, and how the IRM location would then be determined.
Perhaps the whole technical discussion is only concerned with describing how the IRM location shifts over time, as opposed to where it was located to begin with. Leaving us wondering when in time and where in space the reference beginning was. Since there is an offset-error from Airy transit circle, that does not seem to be the exact origin -- yet the origin seems to somehow be connected/derived from that exact location, in some complicated way?
I am left disappointed, to not be able to find the exact story of how the reference-zero meridian for all world locations came to be located exactly wherever it is today. - 71.174.190.122 ( talk) 19:59, 22 December 2016 (UTC)
When one tries to click on the map to see more precisely where the Prime Meridian is, the larger map does not contain it. This is weird if you look at the article for the 180th meridian the map has the meridian nicely drawn on it. I have no idea how what is done here was even done, but the "blow up" lacks the meridian, which is the topic of the article, and the reason one would like to see the larger map. In other words: total fail. 2601:1C2:4C00:E7F:611B:2646:F190:3301 ( talk) 19:13, 2 January 2022 (UTC)
Changes to capitalization by Vic Park ( talk · contribs) are contested at Wikipedia talk:Manual of Style/Capital letters#Capitalization of equator and prime meridian. Jc3s5h ( talk) 18:45, 28 December 2022 (UTC)