Commons:Deletion requests/File:DSNantenna.svg
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This deletion discussion is now closed. Please do not make any edits to this archive. You can read the deletion policy or ask a question at the Village pump. If the circumstances surrounding this file have changed in a notable manner, you may re-nominate this file or ask for it to be undeleted.
This is fake information. The real distance between the antennas is not 120/120/120° but very different from that, and they are not placed on a circle either. PM3 (talk) 20:01, 4 May 2020 (UTC)
- distance of Madrid-Goldstone antennas is ~ 9130 km
- distance of Goldstone-Canberra antennas is ~ 12520 km
- distance of Canberra-Madrid antennas is ~ 17610 km
This gives very different real coverage than in this graphic. --PM3 (talk) 20:12, 4 May 2020 (UTC)
Keep The 120° value comes from NASA itself ([1], [2], [3]) and is an approximation. The diagram even resembles this one on the DSN website. clpo13(talk) 20:40, 4 May 2020 (UTC)
- Whoa, ok. If this graphic just reflects utterly wrong information as published by NASA, this may be reason enough to keep it on Commons. (Should not be used in Wikipedia though, as it is very misleading - a typical case of why OR is deprecated.) --PM3 (talk) 21:06, 4 May 2020 (UTC)
- Keep The nomination appears to be confused by a spherical Earth and the difference between linear distance and the projection of longitude. Linear distance does not matter here (the Moon is far distant, thus equally distant), just the angle. As the Moon's orbit is within 30° of the equatorial plane, the lattitude of the ground stations doesn't matter but as the lunar missions lasted several days, the Earth's rotation does. So the DSN stations need to be 120° or so apart in longitude (and not at the Poles!) but otherwise their location isn't so critical.
- And those actual longitude positions ( 117°W, 4°W, 149°E) are near enough to 120° apart for the purposes of this approximate and illustrative diagram. Andy Dingley (talk) 21:15, 4 May 2020 (UTC)
- Keep: Even if the information is incorrect, COM:NPOV says that as long as the file is in use on other projects (as it is, from ca:Xarxa de l'Espai Profund to zh:深空网络), we should defer questions of accuracy to those projects. If the file is useful to them, it's useful enough for Commons. --bjh21 (talk) 15:16, 5 May 2020 (UTC)
- Keep: Looking from the North or South pole, the angles between the stations are 112, 96, 148 degrees (Madrid 4 W, Goldstone 116 W, Canberra 148 E). If you use these and create a more accurate diagram (which you are more than welcome to add), it will still emphasize the exact same points - low earth orbit is not covered, and once a spacecraft is far away (deep space) then it is always in sight of at least one station. LouScheffer (talk) 17:37, 5 May 2020 (UTC)
- Keep per Bjh21. If you really want these images to be deleted, you should convince all the wikis that use it to not use this image. Then we might be able to talk about COM:SCOPE. --pandakekok9 01:11, 6 May 2020 (UTC)
Kept: per discussion. --Gbawden (talk) 07:54, 11 May 2020 (UTC)
