[time-nuts] Attenuation of typical roof? (at GPS frequencies)
hmurray at megapathdsl.net
Tue Apr 1 19:11:06 EDT 2008
Does anybody have any numbers?
Suppose I have an antenna that is high in my attic. How much do I gain by
drilling a hole in the roof and moving it up a foot?
If I knew the answer (even a rough one), I could compare various ways to get
a few more dB of signal and sort them by cost or effort or ...
Is the attenuation significantly higher when the roof is damp? I'm assuming
a sloped roof so the water won't be very thick. (as compared to a flat roof
that might have puddles)
How does a wet roof compare to the water in the air when it's raining? (or
Is there a good web site that covers this?
These are my opinions, not necessarily my employer's. I hate spam.
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