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Which consequence results when variations in radio refractive index occur on an over-the-horizon radar installation?

A)Increased side lobe interference
B)Reduced bistatic radar cross-section
C)Elevated atmospheric duct blockage
D)Improved signal-to-noise backscatter ratio

💡 Explanation

Increased side lobe interference occurs because variations in indexes induce multipath propagation, leading to constructive and destructive INTERFERENCE. This increases minor lobe strength, therefore the desired signal is subject to disproportionate minor interference rather than benefiting from its characteristics under ideal refractive conditions.

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