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What is the frequency designated to radar altimeters?(a) 4.2 to 4.4 GHz(b) 2.4 to 4.2 GHz(c) 500 to 1 GHz(d) 13 to 14 GHz |
Answer» The correct choice is (a) 4.2 to 4.4 GHz The best explanation: The frequency band of 4.2 to 4.4 GHz is assigned to radar altimeters. This frequency band is high enough to result in a reasonable small sized antenna to produce 40° to 50° beam but significantly low so that attenuation by rain is minimum. |
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