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Doug Huffman

Microwave attenuation, droplet size, number

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Thanks for bringing up WildBlues' favorite ignorance.

Microwave attenuation is a function of droplet size and number in the path.

For the total number = volume, look to the definition of dBZ used in Doppler weather radar.  It is a meteorological measure of equivalent reflectivity (Z) of a radar signal reflected off a remote object. The reference level for Z is 1 mm^6 m^-3, which is equal to 1 μm^3. It is related to the number of drops per unit volume and the sixth power of drop diameter.

The topic is, in general, directly related to Glow-bull Warning.

Cloud cover with heavy moisture will loss the signal do to it's short wave length,

Gets much shorter with the KU birds.

I also use the formula 2808 divided by the freq in MHz equals a 1/4 wave in inches.

So there is a better understanding how big raindrops will absorb intelligence.

With digital you either have a perfect signal or you don't have one.

A slight signal degradation means nothing about speed.

I love your forum, I'm learning or it was a wasted day, as usual haha

Marsh

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