[NLRS] Is there published data on tree foliage ...

[Chris Elmquist]

On Wednesday (07/09/2014 at 11:03PM -0500), Donn, WA2VOI wrote:
> 
> This may help.
> 
> Foliage loss
> L(dB)= 0.2 * f^0.3 *R^0.6
> where: f = MHz
> R= depth of foliage (in meters)
> Valid for 200 - 95,000 MHz
> Depth of foliage R < 400m
> 
> From:
> CCIR Rpt 236-2
> FCC OET Bulletin 70, July 1997

That's interesting.  Does it indicate whether that is dry or wet?
or the worst case?

Judging by attenuation of broadcast TV here, on say 600 MHz, wet trees
are way worse than dry ones...

Chris N0JCF

> ----- Original Message ----- From: "Bill Smith via NLRS"
> <nlrs at mailman.qth.net>
> To: <NLRS at mailman.qth.net>
> Sent: Thursday, July 10, 2014 2:51 AM
> Subject: [NLRS] Is there published data on tree foliage ...
> 
> 
> >
> >
> >... absorption at 432 mHz?
> >
> >Any reference would be appreciated.
> >
> >Thank you es 73.
> >
> >Bill, W0WOI
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-- 
Chris Elmquist