文檔:ConstellationGPS.gif
ConstellationGPS.gif （240 × 192 像素，檔案大細：485 KB ，MIME類型：image/gif、循環、300 畫格、30秒）
摘要
| 簡話 |
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).
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.Deutsch: Eine Simulation von 24 GPS-Satelliten (4 auf jeder der 6 Umlaufbahnen), die die Anzahl der zu einer bestimmten Zeit nutzbaren Satelliten an einem fixen Punkt (45°N) zeigt.
Die Bahnen wurden mit folgenden Voraussetzungen simuliert: Exzentrizität (e) 0.05, Neigung (i) 55° und Trennung zwischen den Bahnen von 60° in der Rektaszension des aufsteigenden Knotens. Innerhalb der Bahnen sind die Satelliten gleichmäßig verteilt (die Position des ersten Satelliten wurde willkürlich gewählt). Die Satelliten umrunden den Planeten innerhalb von 12 Stunden. Der Planet ist eine ideale Sphäre mit einem Radius von 6400 km. Der Zeitraffer beschleunigt die Animation ca. um das 2880-fache, was dazu führt, dass 24 Stunden in einer halben Minute vergehen (siehe Umdrehung des Planeten). Die Simulation wurde mit MATLAB erstellt und mit Adobe ImageReady ins GIF-Format übertragen.Italiano: Una simulazione del progetto originale dell'allocazione spaziale GPS, con 24 satelliti GPS (4 satelliti ciascuno su 6 orbite), la quale mostra l'evoluzione del numero di satelliti visibili da un punto fisso (45 ° N) sulla terra (considerando la "visibilità" "come avere una linea di tiro diretta).
I parametri utilizzati per simulare le orbite sono: eccentricità (e) 0,05, inclinazione (i) 55° e una separazione tra le orbite di 60° nell'ascensione destra del nodo ascendente. All'interno di ciascuna orbita, i quattro satelliti sono distribuiti uniformemente (l'istante del passaggio attraverso il perielio è arbitrario per il primo satellite in ciascuna orbita). Il periodo orbitale dei satelliti era di 12 ore. La terra è stata considerata una sfera perfetta con un raggio di 6400 km. Il tempo nell'animazione corre circa 2880 volte più veloce del tempo reale (mezzo minuto rappresenta 24 ore), come si vede chiaramente nella rotazione della terra. La simulazione è stata creata con MATLAB e convertita in formato GIF utilizzando Adobe ImageReady. |
| 日期 | 2007年12月7日 (原始上傳日期) |
| 來源 | 本檔案是從en.wikipedia轉移到維基共享資源。 |
| 作者 | 英文維基百科的El pak |
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本檔案當選為2014年1月31日的每日媒體。其說明如下：
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).
其他語言
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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授權
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此作品已由其作者，英文維基百科的El pak，釋出至公有領域。此授權條款在全世界均適用。 這可能在某些國家不合法，如果是的話： El pak授予任何人有權利使用此作品於任何用途，除受法律約束外，不受任何限制。 |
原始上傳日誌
- 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)
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| 日期／時間 | 縮圖 | 尺寸 | 用戶 | 說明 | |
|---|---|---|---|---|---|
| 眼前 | 2008年3月6日 (禮拜四) 15:56 | | 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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