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**Orbit3D Applet by Mark Kahrl**

- Launch new satellites using the control panel.
- Navigate by using right-mouse drag, ctrl-right-mouse-drag, shift-ctrl-right-mouse-drag.
- This simulation accurately models the trajectories of earth orbiting satellites based on the user provided initial conditions.
- The left window is a camera on the satellite, the right one is a fixed orbit camera.
- The orbital 'two-body' problem is solved by a finite difference solution to the kinematic equations with angular monentum conservation. The geometry of each orbit and an angle-radius relationship is established by solving the Keplerian equations, this angle-radius relationship is applied at each time step, this effectively removes numerical error caused by the non-linearity of the kinematic equations in the radial direction.

**Links and References:**

Sun Java3D page:

http://java.sun.com/products/java-media/3D/

Java3D User Interface Info:

http://www.manning.com/barrilleaux

Orbital Mechanics:

'Fundamentals of Astrodynamics'; Roger Bate, Donald Mueller, Jerry White; Dover Publications, NY, 1971.