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orbit.txt
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1997-07-08
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WELCOME TO ORBITING SATELLITE DEMO
This demo shows a satellite in orbit around the
Earth.
The objects (Earth and satellite) are subject
to 3 fundamental operations:
1) Scaling : The size of the satellite
can be scaled.
2) Translation : The satellite position
changes over time.
3) Rotation : The Earth, clouds, and the
satellite all rotate. Notice
that the rotation rate of
the clouds is greater than
of the Earth.
The satellite's orbit parameters at the epoch
time are:
semi-major axis : 9200 km
eccentricity : 0.3
inclination : 75.0 degrees
mean anomaly : 38.0 degrees
longitude of ascending node : 64.0 degrees
argument of perigee : 28.0 degrees
You can rotate the entire image by positioning the mouse
in the draw widget, holding down the left mouse button,
and dragging the mouse.
MENU OPTIONS
------------
File Menu:
Select "Quit" to exit the demo.
About Menu:
Select "About Orbiting Satellite" to display this
help text.
FEATURES OF THE ORBITING SATELLITE DEMO
---------------------------------------
<<Start button>>
Start the animation.
<<Stop button>>
Stop the animation.
<<Reset button>>
Reset the initial orientation of the satellite
and the earth.
<<Scaling slider>>
Adjust the slider to scale the size of the satellite
in the range 0.75 to 1.25.
<<Animation step slider>>
Adjust the slider to control the size of the "steps"
the satellite takes in its orbit. A smaller value for
the step means the satellite moves less distance with
each translation, resulting in a smoother animation.
LEFT MOUSE BUTTON
Click-drag-release will rotate the
whole view.
~
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