Our engineer explains our recent poor signal reception: Tropospheric Ducting (a.k.a. Tropo) or what we radio engineers refer to as “Atmospheric Conditions” is any condition that scatters, reflects or refracts radio signals in the Troposphere (the lowest portion of the earths atmosphere) that allows long distance radio reception, and subsequent local interference to occur in the FM radio band. Normally FM radio waves travel line of site fairly close to the ground, and usually the air is warmer close to the ground. As you go up in altitude the air gets cooler, even cold. Think of snow capped mountains in the summer. FM radio refraction occurs when different types of air masses cause a temperature inversion, warm air over cooler air. This causes FM radio signals to travel upward and away from the ground and reflected back down at a much greater distance than normal. Although this temperature inversion is key, the most influencing factor is the addition of humidity. Thus..a warm dry air mass on top of a cooler humid air mass produces the worst conditions for FM radio broadcasters, and this is what we have right now. Thank you for listening and for your patience. GO Jacksonville Jaguars!
Posted on: Fri, 09 May 2014 21:48:26 +0000
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