File talk:Comparison satellite navigation orbits.svg

Galileo altitude
I'm not sure the placement of the Galileo satellites' orbital altitude is correct in this diagram. According to the scale, they're depicted here as orbiting at just under 20,000 miles above sea-level. However, the Galileo page (http://en.wikipedia.org/wiki/Galileo_positioning_system#Galileo_satellites) says their orbital altitude is 23,222 km (which would be 14,429 miles). Am I missing something?
 * According to http://ec.europa.eu/enterprise/policies/satnav/galileo/files/galileo-os-sis-icd-issue1-revision1_en.pdf, the orbital radius is 29 601.297 km (left scale) and according to http://ec.europa.eu/enterprise/policies/satnav/galileo/files/br-297_galileo_web.pdf, the altitude (height above Earth's surface) is 23 222 km (right scale), which are consistent with the graphics. cm&#610;&#671;ee&#9094;&#964;a&#671;&#954; 15:43, 9 October 2013 (UTC)

GPS vs NAVSTAR
All the systems are GPS systems, the US system is called NAVSTAR and should be labeled as such. — Preceding unsigned comment added by 150.101.153.175 (talk) 03:23, 4 December 2014 (UTC)
 * According to common usage , "GPS" refers to the US one. cm&#610;&#671;ee&#9094;&#964;a&#671;&#954; 23:04, 16 April 2016 (UTC)

Mm unit
Maybe a small remark about the unit Mm could help. Not everyone will easily understand that megameters are meant. --Eio (talk) 15:24, 19 December 2015 (UTC)
 * OK, fixed! cm&#610;&#671;ee&#9094;&#964;a&#671;&#954; 22:55, 16 April 2016 (UTC)