Also known as: AT^
AT has various meanings in the Construction category. Discover the full forms, definitions, and usage contexts of AT in Construction.
Gaseous envelope surrounding Earth Consists of two layers; the lower, or troposphere, and the upper, or stratosphere. Weight of atmosphere on each square inch of Earth's surface is approx 14.1 Ib at sea level. The Earth's atmosphere is 120 miles thick and is composed mainly of nitrogen, oxygen, carbon dioxide, and a few other trace gases.
ConstructionIs the weakening of a radar beam as it moves downstream due to some of the energy being lost to scattering and absorption. The further a radar beam moves downstream the more dust, hydrometeors, etc. the radar beam will have to pass through. Reduction in current, voltage, or power due to transmission. The opposite of amplification.
ConstructionArrangement of wires for sending or receiving radio waves
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