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Old 07-24-2008, 11:44 AM
Lars H-L Lars H-L is offline
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Join Date: Oct 2005
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Which diffraction method/algorithm to use depends on the path in question. From the sparse information you give, it seems to me that you should use the isolated obstacle algorithm. This method accounts for the rounding (profile radius) of the obstructing hill, which can be set independently.

If you need a reliable (final) value for the diffraction loss and its variability a field radio test may be the only way.
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