awesome!
your posted simulation will be studied perhaps even adopted to be the base template for another applet that i have been working on http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1877.0 Ejs Open Source Geostationary Satellite around Earth Java Applet.

or on another simulation http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2204.0 Ejs Open Source Newton's Mountain Projectile Orbits Model java applet
i actually tried to add 3D into my remixed simulation but the Ejs failed to render the 3D parts of the model, only 2D seems to work.
i abandon the modification (mods) because i could not figure out the problem with the xml or Ejs itself could not generate such a complex multiple view of 2D and 3D select-able.


i should be a ble to enhance them all
1. http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1877.0 Ejs Open Source Geostationary Satellite around Earth Java Applet [img]http://1.bp.blogspot.com/-ofiuvIwCBeM/TgYBLGjw_4I/AAAAAAAAAts/QLAyUtkhvc8/s320/Ejs+Open+Source+Geostationary+Satellite+around+Earth+Java+Applet.png[/img]
2. http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2204.0 Ejs Open Source Newton's Mountain Projectile Orbits Model java applet [img]http://4.bp.blogspot.com/-vJbz1C1lafA/Tg14G0zFwrI/AAAAAAAAAvE/lNXb5KlHPRw/s320/Ejs_Open_Source_Newton%2527s_Mountain_Projectile_Orbits_Model_java_applet.png[/img]

a little more, thanks to your newly released physics simulation on Satellite motion in 3D.

thanks!