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These coordinates are in a spherical
coordinate system whose equator and prime meridian intersection track
the location of the selected solar system object (moon, planet, etc.).
The major axis of this coordinate system is parallel to the major axis
of the coordinate system defined by the ant.coordinatemode keyword.
Similarly the minor axis is parallel to that defined in the
ant.coordinatemode keyword.
Toney Minter
2003-09-30