File talk:ConstellationGPS.gif

Featured Picture[edit]

I am stunned to see that this is not a featured pic - it is very informing, and highly contributes to a basic understanding of the concept of GPS. --OscarBor (talk) 07:16, 8 April 2008 (UTC)[reply]

I agree, this image is utterly badass. Tisane (talk) 20:51, 16 May 2010 (UTC)[reply]

Wie sieht die Erde aus der Sicht der 24 GPS Satelliten in "20.183 km " "20,200 kilometers (12,600 miles or 10,900 nautical miles; orbital radius of 26,600 km (16,500 mi or 14,400 NM))" Hoehe aus. Gibt es in jedem der 24 Satelliten eine 24 Stunden Videokammera?[edit]

http://upload.wikimedia.org/wikipedia/en/3/30/Globespin.gif
http://de.wikipedia.org/wiki/HRSC
High Resolution Stereo Camera (HRSC)- Germany - Produces color images with up to 2 m resolution. Is mounted inside the spacecraft body, aimed through the top face of the spacecraft, which is nadir pointing during Mars operations. Instrument mass: 20.4 kg[7]
http://en.wikipedia.org/wiki/Mars_Express#Mars_Express_instruments

194.66.226.95 (talk) 12:30, 8 June 2008 (UTC)[reply]

(edit: reverted my own edit here) anil thakur —Preceding unsigned comment added by 78.101.51.168 (talk) 14:06, 23 July 2010 (UTC)[reply]

Satellite spacing inconsistent with GPS article[edit]

The GPS article says that "the angular difference between satellites in each orbit is 30, 105, 120, and 105 degrees", but this depicts the angular differences as 90 degrees.

The angular difference issue should be verified and, if necessary, this image should be updated. 134.134.139.74 (talk) 19:47, 17 February 2011 (UTC)[reply]

I don't know how you are able to determine that "the angular difference in the figure is 90 degrees for all satellites". First of all the figure provides a two dimensional depiction of three dimensional motion. It is hard to measure angles accurately in this situation. Second the satellites are continually moving. There are not only difficulties in measuring the angles between moving objects in a given plane but also the distraction of the motion in other planes. But you may have found a way to measure the angles in the figure. If so, I would like to see an explanation of how you do it. RHB100 (talk) 19:24, 25 April 2011 (UTC)[reply]

I've created a derivative image that shows the 90-degree spacing clearly for each of the six orbital planes. Please see http://www.kerryveenstra.com/images/gps-90-degrees.png KerryVeenstra (talk) 19:33, 17 July 2012 (UTC)[reply]