Re: NEC-LIST:Imperfect Ground

Good day all.

Recently my computer was stripped, and I no longer have the original file
with the conductivity data. I can try to reconstruct it from hard copy if
anyone is really interested. I still have the original references.

best regards,
Duncan Baker.

----- Original Message -----
From: "Renier Dreyer" <renier.dreyer_at_poynting.co.za>
To: <nec-list_at_gweep.ca>
Sent: Wednesday, November 27, 2002 2:35 PM
Subject: Re: NEC-LIST:Imperfect Ground

> Mr. Lorentzou
>
> The source of the conductivity and permittivity values I quoted originated
> from the NEC list.
> Dr Nitch provided me with the values but the NEC-list message where the
> values originated came from Prof DC Baker.
> That message was dated Tuesday 30 May 2000 for those who might have NEC
list
> messages stored that far back.
>
> I think the values were collected over a period of time from observations,
> but I may be wrong.
>
> Regards
> Renier Dreyer
> Development Engineer
> Poynting Software
>
> ----- Original Message -----
> From: "Maria I. Lorentzou" <lorentz_at_power.ece.ntua.gr>
> To: "Renier Dreyer" <renier.dreyer_at_poynting.co.za>
> Sent: Wednesday, November 27, 2002 12:34 PM
> Subject: Re: NEC-LIST:Imperfect Ground
>
>
> > Mr. Dreyer,
> >
> > Are the values for ground conductivity and relative permittivity
> "empirical"
> > ?
> > Thank you
> >
> > M.Lorentzou, PhD
> > Researcher
> > N.T.U.A., Greece
> >
> > ----- Original Message -----
> > From: "Renier Dreyer" <renier.dreyer_at_poynting.co.za>
> > To: <nec-list_at_gweep.ca>
> > Sent: ???????, 27 ????????? 2002 12:25 ??
> > Subject: Re: NEC-LIST:Imperfect Ground
> >
> >
> > > Hi Yee Hui
> > >
> > > I found some values for ground conductivity and relative permittivity.
I
> > do
> > > not have a reference for it though.
> > > There are different values for different types of ground.
> > >
> > > Pastoral, low hills, rich soil: Conductivity = 0.0303 to 0.01 S/m and
> > > Relative Permittivity = 14-20
> > > Flat country, marshy, densely wooded: Conductivity = 0.0075 S/m and
> > Relative
> > > Permittivity = 12
> > > Pastoral, medium hill and forestation: Conductivity = 0.006 S/m and
> > Relative
> > > Permittivity = 13
> > > Pastoral, medium hills and forestation, heavy clay soils: Conductivity
=
> > > 0.005 S/m and Relative Permittivity = 13
> > > Rock soil, steep hills, typically mountainous: Conductivity = 0.002
S/m
> > and
> > > Relative Permittivity = 12-14
> > > Sandy, dry, flat, coastal cities, industrial areas: Conductivity =
0.001
> > S/m
> > > and Relative Permittivity = 5
> > > Cities, heavy industrial areas, high buildings: Conductivity = 0.001
S/m
> > and
> > > Relative Permittivity = 3
> > >
> > > Hope this helps
> > >
> > > Renier Dreyer
> > > Development Engineer
> > > Poynting Software
> > >
> > > ----- Original Message -----
> > > From: "Lee Yee Hui (Dr)" <EYHLee_at_ntu.edu.sg>
> > > To: <nec-list_at_gweep.ca>
> > > Sent: Wednesday, November 27, 2002 11:32 AM
> > > Subject: NEC-LIST:Imperfect Ground
> > >
> > >
> > > > Hi everybody,
> > > >
> > > > Good day! Could I find out if anybody has an idea of a
> > > > typical ground conductivity and typical ground dielectric constant
> > > > value that I can use to model imperfect ground conditions?
> > > >
> > > > Thank you in advance and have a wonderful day!
> > > >
> > > > Best regards,
> > > > Yee Hui
> > > > --
> > > > The NEC-List mailing list <nec-list_at_gweep.ca>
> > > > http://www.gweep.ca/mailman/listinfo.cgi/nec-list
> > > --
> > > The NEC-List mailing list <nec-list_at_gweep.ca>
> > > http://www.gweep.ca/mailman/listinfo.cgi/nec-list
> > >
> >
> --
> The NEC-List mailing list <nec-list_at_gweep.ca>
> http://www.gweep.ca/mailman/listinfo.cgi/nec-list
>
>

-- 
The NEC-List mailing list <nec-list_at_gweep.ca>
http://www.gweep.ca/mailman/listinfo.cgi/nec-list