Transmissions In the millimeter wave band are easily absorbed by rain drops, humidity has significant impact.

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Drops of rain spattered our brows.

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Then, at about the moment I see the curtain of fog and rain around the next turn, the drops begin pelting the windshield.

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Since the rate at which small drops sweep one another up to form large drops varies with the square of their diameter, such drops are too tiny to make rain.

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The Pocket PC-based PPT 2700 series, for instance, can withstand multiple drops from a height of four feet to a concrete floor, and it is sealed against rain and dust.

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