: Saturday, February 29, 2020 9:24 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] freznel impact calculator
If the width of the blade where it intercepts the LOS is as wide as the first
fresnel zone I would expect big problems.
But if you just have blade tips encroaching on the
If the width of the blade where it intercepts the LOS is as wide as the first
fresnel zone I would expect big problems.
But if you just have blade tips encroaching on the upper number fresnel zones
or a portion of the first fresnel zone I don’t think it would be a problem.
From: Steve Jones
S
don’t know how fast the AGC is on a licensed radio, but the turbine blades
turn pretty slow. Whoosh … whoosh … whoosh.
From: AF On Behalf Of Eric Nielsen
Sent: Friday, February 28, 2020 7:00 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] freznel impact calculator
Yeah, the
Yeah, the process is completely outside of the standard interference
analysis database. I don’t recall the tools they use, but it performs a 3D
analysis and calculates the fresnel clearances when plotting the turbines,
factoring the hub height and blade length.
Pretty cool stuff.
On Fri, Feb 28, 2
Im reaching out to them, they did a path study for a similar thing on one
of our links, it was not on our dime for that link, so maybe we didnt get a
full dataset and report back, we just got a yes/no on impact, but not
enough detail to make a risk assessment. They told me they have access to
the t
Comsearch does something called a “reverse geoplanner”. If you provide them
with the turbine locations and the path details they’ll tell you the risk
of fresnel obstruction.
They’re equipped to do this because they perform the microwave studies for
wind farms.
On Fri, Feb 28, 2020 at 5:43 PM Steve
