Full Version 1.0 - © 2002 Steffen Maus und Daniel Roth - All Rights reserved!
The moon is moving around the earth. The gravitational effect on the earth's oceans (tides) can be observed. For better observation the relation between the displayed size of the earth and the tidal height is not similar to reality but 1:40.000 (no zoom selected) or 1:200.000 (zoom selected). In addition relative to the distance between the earth and the moon, their size is five times larger than in reality.
The background of the animation is a linear approximation of the theory. Effects of streaming water are not included in the calculation of the tidal heights. On the right side of the animation the tidal height is displayed in numbers and graphically.
Zenit = the tidal height on the side of earth directed to moon
Nadir = tidal height on the opposing side
- The appearence of the moon and the earth can be changed by editing the ".gif" bitmap files in the directory.
The following methods are available:
sets the semi-major-axis to "value" (km). Valis values are between 10.000 and 380.000km.
Sets the excentricity to "value". Valid values are between 0 and 1.
Zooms view by factor 5. The sizes of earth and moon are not affected by zooming.
Turns the zoom off.
make user interface elements visible or invisible:
state = "yes": make user interface element visible
state = "no": make user interface element invisible
element = "Start": button for starting/stopping simulation
element = "Reset": button for reseting simulation
element = "Zoom": button to control zooming
element = "Distance": scrollbar and display of the semi-major axis
element = "Eccentricity": scrollbar and display of the excentricity
element = "Diagram": diagram of the tidal height for zenit and nadir