The default status for the simulation is a synchronized satellite.

[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=2245.0;attach=4335;image[/img]

You can drag the arrow to change it's velocity when it is paused.

Click reverse button to change it's direction (opposite direction with same speed).

Please noticed that the satellite itself did not rotate when it is moving around the earth.
Enjoy it!

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