Talk:Ionosphere

message: First line of this article: The ionosphere is the part of the atmosphere that is ionized by solar radiation
And then the last sentence of the first paragraph under 'Geophysics': Note: The ionosphere is NOT a layer in the Earth's atmosphere.
So which one is it?
:heh.  hmm..  might depend on your definition of edge of space? - Omegatron 15:47, Mar 8, 2005 (UTC)
Actually, no contradiction, however the working can be improved.  The ionosphere is PART of the atmosphere, but not a LAYER.  The new graphic should also help.  Bhamer 06:25, 9 Mar 2005 (UTC)
thread_title:  contradiction 

message: Maybe "Geomagnetic storm" should be in magnetosphere?  (SEWilco 04:21, 16 Mar 2005 (UTC)
replies: text: Geomagnetic storm is the correct term, but I did change "Earth's magnetic field" to "Earth's magnetosphere".  That is more correct. Bhamer 04:56, 16 Mar 2005 (UTC)
replies: text:  Rephrasing: Maybe the section "Geomagnetic storm" should be in the article magnetosphere?  However, maybe it actually should be in the article geomagnetic storm.  Of course, there should be mention in this article of its effects upon the ionosphere.  (SEWilco 08:10, 16 Mar 2005 (UTC)
replies: text: OK.  Probably what needs to be done is have the article geomagnetic storm be expanded to include its effect on the ionosphere, have more details on the types and severity of geomagnetic storms, and also the effects of the storms on landline communications systems and power grids.  There is a lot more material to cover on geomagnetic storms and a lot of good examples of its effects on power grids.  The storms also effect man-made satellites.  Bhamer 11:41, 16 Mar 2005 (UTC)
replies: text:  I stumbled across a source for that.  Done.  Plenty to update over yonder now. (SEWilco 08:09, 19 Mar 2005 (UTC)
thread_title:  Geomagnetic storm 

message: Ok, I'm slow..    don't understand the above statment.  yes, I got lazy, Aurora in southern hemisphere is Aurora Australias.  Is this your comment?  Bhamer
: Looks to me like you understood it.  (SEWilco 05:58, 20 Mar 2005 (UTC)
thread_title: 'Would be too interesting to have Aurora Borealis at South Pole'

message: it influences high-frequency (HF) (3kHz-30MHz) radio propagation
Should that lower limit be 3MHz, not 3kHz? Josh Cherry 02:57, 27 May 2005 (UTC)
replies: text: Yup. Radio frequency.  Fixed. (SEWilco 08:57, 27 May 2005 (UTC)
thread_title:  High-frequency (HF) 

message: First we have this:
"At night the E layer rapidly disappears because the primary source of ionization is no longer present. "
Followed by:
"After sunset an increase in the height of the E layer maximum increases the range to which radio waves can travel by reflection from the layer."
It can't be both ways. Either the E layer disappears at night or it doesn't!  — Preceding unsigned comment added by 124.170.204.195 (talk) 09:48, 29 March 2013 (UTC)
thread_title:  E Layer contradictory statements 

message: I killed the word "project" in "project HAARP." HAARP is a program, not a project. Besides, it sounds pretty silly to talk about "project high-frequency active auroral research PROGRAM," doesn't it?  John Elder 09:01, 21 May 2006 (UTC)
thread_title:  There is no "project" in HAARP 

message: The comment inserted about Nikola Tesla is bogus.  Tesla is a fascinating character, but he knew nothing about the ionosphere, and it is highly unlikely that he resonated the Earth with his Colorado Springs experiment.  Beware of the crank science that orbits around Tesla's name. DonPMitchell 02:40, 29 July 2007 (UTC)
thread_title:  Tesla 

message: There are only two references in the section "The Ionospheric Layers", neither of which verify the scientific content.  For instance, the sentences "Ionization here [the D layer] is due to Lyman series-alpha hydrogen radiation at a wavelength of 121.5 nanometre (nm) ionizing nitric oxide (NO). In addition, when the sun is active with 50 or more sunspots, hard X-rays (wavelength < 1 nm) ionize the air (N2, O2)." have no references, and this is hardly 'common knowledge'.
SkunkyMonkey (talk) 19:20, 21 May 2008 (UTC)
thread_title:  Very few references 

message: This article among most others talks about radio waves refracting from the ionosphere. To my understanding what happens is clearly reflection. Refraction would only change the direction slightly, but the waves actually reflect back towards Earth, so in my understanding refraction is not the case! --84.250.188.136 (talk) 22:09, 17 June 2008 (UTC)
replies: text: Reflection holds only for vertical incidence. At oblique incidence (so for propagation) the ray may in fact be writhed by up to 180 degrees Kmarawer (talk) 17:49, 25 January 2010 (UTC)
replies: text: If this is true, then atmospheric scientists must use different language than physicists. To physicists, the wave returning back to earth is clearly reflected. There is no refracted wave below the plasma frequency. I have change it.  —Preceding unsigned comment added by 129.63.129.170 (talk) 19:04, 9 March 2010 (UTC)
replies: text: It is easily misunderstood.  Except for rare cases, refraction is the correct term.  See, for example, the first two paragraphs at Skywave, noting especially the "bent back (refracted), as if reflected" passages. The terms are often used interchangeably.  I am reverting most of the edit. Hertz1888 (talk) 20:56, 9 March 2010 (UTC)
thread_title:  Ref(ra|le)ction 

message: "frequency of collision between electrons and other particles in this region during the day is about 10 million collisions per second. "
per what? cubic centimeter?  —Preceding unsigned comment added by 71.15.154.147 (talk) 08:10, 13 May 2009 (UTC)
thread_title: Collision Freq in D layer

message: i removed that statement as the ionised section of the atmosphere is not located only in the thermosphere--Mongreilf (talk) 19:23, 24 May 2009 (UTC)
thread_title:  located in the thermosphere 

message: How did these layers get those particular names?  Were there at one time thought to be A, B, and C layers?  It would be good if this article answered those questions.  Carolina wren (talk) 02:43, 20 April 2011 (UTC)
thread_title:  D, E, and F 

message: "From 1972 to 1975 NASA launched the AEROS and AEROS B satellites to study the F region."
Why specifically mention these satellite missions?  I think this gives the false impression that we no longer have satellites studying the F region.  98.212.193.212 (talk) 05:58, 21 November 2011 (UTC)
thread_title:  Importance of AEROS A and B satellites? 

message: Please clarify:
"...the atmosphere is so thin that free electrons can exist for short periods of time..."
Is that like nano seconds? (surely a short period of time) or seconds?
DGerman (talk) 19:39, 20 March 2012 (UTC)
replies: text: Probably worthy of clarification we may be talking about collision frequency at some point. On another note I am not sure what a shell of electrons in the first sentence means Mkomboti (talk) 16:18, 5 April 2023 (UTC)
thread_title:  Geophysics:thermosphere: short period of time 

message: What actually is the difference between these two? I think they are the same and ionosphere is the more common term. If so these two articles should be merged. Thoughts? Aarghdvaark (talk) 04:50, 2 May 2012 (UTC)
replies: text: Yes, you are right, but the Wikipedia articles are not so clear about the distinction. e.g. "Radiation causes the atmosphere particles in this layer [the Thermosphere] to become electrically charged (see ionosphere), enabling radio waves to bounce off and be received beyond the horizon" and "Within this layer [the Thermosphere], ultraviolet radiation causes ionization". There is no other mention of the ionosphere in the mesosphere article, except as a 'see also' link. There is no mention at all of the ionosphere in the exosphere article. The mesosphere article does though note that the mesosphere contains the D layer of the ionosphere. Without reading the ionosphere article, the impression would be that all layers of the ionosphere but the D layer are in the thermosphere. Aarghdvaark (talk) 08:59, 9 May 2012 (UTC)
thread_title:   Thermosphere and ionosphere 

message: Why is it that you do not mention the nuclear bombs that were set off in the ionosphere in the 50's and 60's ?  — Preceding unsigned comment added by Arydberg (talk • contribs) 11:31, 29 May 2013 (UTC)
thread_title:  nuclear bombs 

message: There is a variety of nomenclature in the article for layers. E.g. "D region" vs "D-rgeion" vs "D layer". Which is which? And should they be consistent for E & F regions/layers too?  — Preceding unsigned comment added by 193.63.181.95 (talk) 18:54, 24 June 2015 (UTC)
thread_title:  Layer vs Region 

message: Other planets have ionospheres, as even the Venus Wiki links to this one. I would say it would be good to change the specific Earth references to the broader term of planet, however the specific data on Earth's ionosphere is lkely good to keep I think.  — Preceding unsigned comment added by 2610:130:116:1800:2CEA:8348:6FDC:6BC4 (talk) 02:21, 25 October 2016 (UTC)
thread_title:  Beyond Earth 

message: In the second paragraph of Geophysics, it reads "This portion of the atmosphere is ionized".  I believe this claim is inaccurate, at least misleading.  In the context of astronomy, "an atmosphere is ionized" indicates that the number fraction of ion is larger than neutral particle.  However, this is not true for earth ionosphere.  The atmosphere stays neutral all the way to very upper part of the exosphere.  See Figure 7.7 in Kivelson & Russell 1995  or http://www.physics.usyd.edu.au/~cairns/teaching/lecture16/img20.gif
I added "partially" 2601:240:C901:D8E0:5CD5:56F0:722:E953 (talk) 15:36, 26 May 2017 (UTC)
thread_title:  Ionized or Neutral 

message: Hello fellow Wikipedians,
I have just modified 3 external links on Ionosphere. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20080719143702/http://www.esa-spaceweather.net/sda/ionosfera/ to http://www.esa-spaceweather.net/sda/ionosfera/
*Added archive https://web.archive.org/web/20090923133049/http://wcflunatall.com/nz4o5.htm to http://www.wcflunatall.com/nz4o5.htm
*Added archive https://web.archive.org/web/20060828143744/http://www.haystack.mit.edu/atm/mho/index.html to http://haystack.mit.edu/atm/mho/index.html
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 03:10, 16 November 2017 (UTC)
thread_title:  External links modified 

message: Hello fellow Wikipedians,
I have just modified 2 external links on Ionosphere. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20031203000823/http://sec.noaa.gov/radio/ to http://www.sec.noaa.gov/radio
*Added archive https://web.archive.org/web/20050405102819/http://www.sec.noaa.gov/rt_plots/xray_1m.html to http://www.sec.noaa.gov/rt_plots/xray_1m.html
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 17:10, 21 January 2018 (UTC)
thread_title:  External links modified (January 2018) 

message: I got to this page through reading about Aurora.
The two are very much related, so it was strange to read here that a first hypothesis of electrically conducting regions occurred in 1839, and then jumps to Marconi. The page on Aurora suggests a knowledge of electrical layers in the atmosphere back in the 1700's, and gives many examples of the gradual understanding via effects of the Auroa — such as telegraph operators working without batteries. 94.247.186.130 (talk) 17:23, 11 February 2023 (UTC)
thread_title:  Discovery and Aurora 

message: This section seems to have most of the pertinent information but I would like to re-write the section so that it flows better.I will also verify the references and add some more Mkomboti (talk) 05:08, 3 April 2023 (UTC)
thread_title:  History of discovery