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SET TOPOLOGY topology

topology   Character(len=24) ! Topology for the overlapping azimuth range

Choices for topology are:
LOW HIGH

Select a "topology" for sources in the overlapping azimuth range 
60 to 100 degrees = 420 to 460 degrees.

The 30m antenna has azimuth limits of 60 and 460 degrees.  Azimuth 360
degrees is due North. Therefore there is an overlap range approximately 
toward East-Northeast, which the antenna can reach at a low azimuth 60
to 100 (from the South) or at a high azimuth 420 to 460 (from the North).

SET TOPOLOGY LOW  selects to use the azimuth range  60 to 420 degrees
SET TOPOLOGY HIGH selects to use the azimuth range 100 to 460 degrees

Note: this is shown in a figure in paKo's manual, 
Section "NCS Explained: Azimuth Topology". 

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