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Summary
| Description |
A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45°N) on earth (considering "visibility" as having direct line of sight).
The parameters used to simulate the orbits are: eccentricity (e) 0.05, inclination (i) 55° and a separation between orbits of 60° in the right ascension of the ascending node. Within each orbit, the four satellites are evenly spaced (the instant of pass through perihelion being arbitrary for the first satellite in each orbit). The orbital period of the satellites was taken to be 12 hours. The earth was considered a perfect sphere with a radius of 6400 km. The time in the animation is running about 2880 times faster than real time (half a minute representing 24 hours), as clearly seen in the rotation of earth. The simulation was created using MATLAB and converted to animated gif format using Adobe ImageReady. |
| Date | 7 December 2007 (original upload date) |
| Source | Transferred from en.wikipedia to Commons. |
| Author | El pak at English Wikipedia |
This diagram was created with MATLAB.
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This file was selected as the media of the day for 31 January 2014. It was captioned as follows:
English: A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45°N) on earth (considering "visibility" as having direct line of sight).
Other languages
English: A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45°N) on earth (considering "visibility" as having direct line of sight). 中文（简体）：北纬45度一定点与全球卫星定位系统24颗卫星的链接
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Licensing
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This work has been released into the public domain by its author, El pak at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: El pak grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
- 2007-12-09 17:51 El pak 240×192×8 (497149 bytes) A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45ºN) on earth (considering "visibility" as having dire
- 2007-12-07 01:41 El pak 316×272×10 (1186667 bytes) A simulation of the 24 GPS satellites (4 satellites in each of 6 orbits), including the evolution of the number of visible satellites from a fixed point (45ºN) on earth (considering "visibility" as having direct line of sight)
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:56, 6 March 2008 | | 240 × 192 (485 KB) | Shushruth | {{Information |Description={{en|A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45ºN) on earth (conside |
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This page was last edited on 9 December 2015, at 04:24