Talk:Altitude

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Altitude (Steve gibbs)

Progressive/Trance Producer based in London and originally from Adelaide, Australia. Famous for melodic, sophisticated trance anthems like Altitude 'Excession', Altitude 'Altitude', Altitude 'Tears in the Rain' and many others. Releases under other names such as Steve Gibbs, Tremor, Sub HQ, Sound of Soho and Antartica and has appeared on leading electronic music labels such as Bonzai, Platipus, Eye Industries, Acetate Ltd, Gekko, INCredible and Five AM. Steve burst onto the scene in 1997 and has since seen his many records supported by the worlds biggest DJ's paul Oakenfold, Pete Tong, Judge Jules, Tiesto, Armin van Buuren and Paul van Dyk.

The altitude definitions have a few issues which I've tried to correct. For one thing it used to say that 'height' was the same as 'absolute altitude' (which it defined as altitude above the terrain over which it is flying). These are not the same, as anyone who has landed at an airfield near a mountain will testify. DJ Clayworth 21:31, 20 July 2006 (UTC)

Absolute Altitude (ha)[edit]

I belive the Absolute altitude has been wrongly defined in this article as your Absolute altitude is the distance from the center of the earth to your current position. It is more commonly used in space-crafts and the absoloute altimeter gives you your distance from the center of the earth?

International standards[edit]

I believe that the International Standard for altitude in aviation is feet, and that only the Soviet Union and China used (still use?) meters. This is also suggested by the altimeter article. can anyone confirm either this or the article’s current statement (hopefully with a source. —MJBurrageTALK • 10:35, 1 May 2007 (UTC)

The standard for aviation altitude is feet. Just think of the potential safety issues that would ensue if aircraft from different countries used different standards, related both to equipage and pilot training. I spot checked Australia and they use feet. Don't know about former USSR or China, but the statement is certainly not true the way it is stated. I'm certain enough to make the change to the article. Aarky 18:03, 2 June 2007 (UTC)

further definition required[edit]

Definition of altitude for flight is not covered. What is sea level, very-low altitude, low altitude, high altitude, and very high altitude, and I assume there is 'medium' altitude also? I appreciate that different aircraft have different maximum ceilings, but this also applies to radar operations, anti-aircraft defense engagement altitude, and parachuting.--Mrg3105 07:27, 29 July 2007 (UTC)

I don't understand your comment. Altitude for flight is covered in the section Altitude in aviation, and a link to the article on mean sea level is given. I am not aware of any special meaning for the terms very-low altitude, low altitude, high altitude, or very high altitude in aviation. If these terms have a special meaning in parachuting, radar operations, or anti-aircraft engagement, perhaps you could add a section and provide those definitions (with references, of course). Aarky 05:17, 3 August 2007 (UTC)
These are operating mission altitudes often referred to in military history and pilot accounts.--Mrg3105 09:23, 5 August 2007 (UTC)

Hypoxia[edit]

The sentence "It is the fall in pressure that leads to a shortage of oxygen (hypoxia) in humans on ascent to high altitude." has wverything to do with hypoxia, but in the context of this article is is, at most, an distractive observation or a sidebar, especially in the introductory paragraph -- and as such it could be a candidate for deletion. Jasmantle (talk) 18:44, 20 January 2008 (UTC)

Page split suggested[edit]

Most of this page discusses "Altitude in Aviation". The prolog seems to promise that it is about altitude in general, and there is a lot of text at the bottom that doesn't refer to altitude, but to the layers of the atmosphere (tropospher, stratosphere, etc).

I would suggest:

  • Layers of the atmosphere be moved to it's own page (one probably already exists)
  • The page discuss Altitude only - or be eliminated entirely
  • The majority of the content be moved a new page which is titled - appropriately - Altitude in Aviation. Jasmantle (talk) 22:49, 20 January 2008 (UTC)

Also, the section "Altitude in aviation and in spaceflight" doesn't discuss anything about altitude in relation to spaceflight. It seems to be a section only about "aviation in altitude". — Preceding unsigned comment added by Rguinness (talkcontribs) 08:51, 7 August 2014 (UTC)

Fixed. —hike395 (talk) 07:27, 8 August 2014 (UTC)

Oppose both splits. I don't think that either section is detailed enough to warrant the creation of new articles. Check out Effects of high altitude on humans to see the level of detail that I think would warrant a split. —hike395 (talk) 07:27, 8 August 2014 (UTC)

Also note that the original proposal (above) dates to early in 2008, when the article was 1/5 its current size. That proposal is now out-of-date. —hike395 (talk) 07:42, 8 August 2014 (UTC)

Your altitude[edit]

How do you find your altitude besides GPS; where is the best altitude map of New York State? Daniel Christensen (talk) 17:26, 17 November 2009 (UTC)

altitude standard[edit]

Actualy, the standard for aviation altitude is the feet, but only after 1945, but before, ALL European countries, exept Great Britain, use only the meter.In 1945 the USA DICTATE the international usage of the feet...THIS is the real history! —Preceding unsigned comment added by 92.161.238.7 (talk) 14:10, 31 October 2010 (UTC)

Definition of Pressure Altitude[edit]

I changed a sentence in the definition of Pressure Altitude. It stated "Pressure altitude and indicated altitude are the same when the altimeter is set to 29.92" Hg or 1013.25 millibars." Changed to "[…]when the altimeter setting is 29.92" Hg[…]". The altimeter setting is the value that should be set in the altimeter window so that the indicated altitude is corrected to the local barometric pressure at Mean Sea Level. If the local altimeter setting is not 29.92, setting it in the window will not make the pressure altitude equal to the indicated altitude, but it will make the indicated altitude incorrect!!! Chamblyen (talk) 01:14, 28 November 2014 (UTC)

First paragraph of "High altitude and low temperature"[edit]

The second paragraph of Altitude#High altitude and low temperature is in excellent agreement with the literature (modulo the question of whether "dry air" means the same thing to physicists and meteorologists). However the first paragraph repeats the common misconception that higher altitudes are colder because of the greenhouse effect. Certainly reference [8] makes no such claim (haven't checked [9]).

If no one has any objection I will rewrite the paragraph to attribute lapse rate to adiabatic expansion at higher altitudes.

Some interesting perspectives on the impact if any of GHGs on lapse rate can be seen at this blog. Vaughan Pratt (talk) 22:37, 20 March 2016 (UTC)

I copied the material from mountain and alpine climate, so whatever we should do should change all three articles. Before we do any editing, can we find a reliable source that explains the issue and cite to it? I don't have easy access to [9]. It's clear that both radiation (the "greenhouse effect") and convection (adiabatic expansion) are factors, but I'm not enough of an expert to disentangle them. (The atmosphere is not in equilibrium, which makes it difficult to understand). —hike395 (talk) 12:11, 21 March 2016 (UTC)
I checked [9] (bought a used copy online) and it attributes the cold of high altitudes entirely to lapse rate with no contribution from the greenhouse effect. Vaughan Pratt (talk) 07:24, 2 May 2016 (UTC)
Just double checking, because lapse rate is an effect: [9] attributes the cold to adiabatic expansion (convection), not radiation? —hike395 (talk) 12:02, 2 May 2016 (UTC)

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Merge above mean sea level here[edit]

Vertical distances.svg

There was a previous proposal to merge with Elevation, see discussion here In that discussion a proposal was made to:

This image prompted the AMSL move to Altitude and may be helpful again Ex nihil (talk) 10:51, 10 October 2017 (UTC)

Support merge of Metres above sea level into altitude. The former has little useful content and shouldn't be a standalone article. —hike395 (talk) 15:32, 16 October 2017 (UTC)
Height of the ground above mean sea level and Height above mean sea level are both redirects already (therefore contain no content to be merged). I can't find any history of a previous "merge" prompted by the image above.
If this is a proposal to merge Metres above sea level -> Altitude, I still oppose, because the term is equally applicable to Elevation, as illustrated. See also the previous discussion linked above. Burninthruthesky (talk) 11:53, 10 October 2017 (UTC)