Re: NEC-LIST: World Radio Noise Maps

Dear Moderator:
    I have addressed these issues with you in the past. There is not the
slightest deception or covering of identity going on in my messages nor by
my ISP.
    As I recall, a careful reading of the quoted RFC suggests that the dot
use mentioned is not mandatory.

    Please modify the filter used not to be upset with my messages.

    Regards,
    Professor James C. Mc Laughlin

J. Mc Laughlin; Michigan U.S.A.
Home: JCM_at_Power-Net.Net

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> From: "J. C. Mc Laughlin" <jcm_at_power-net.net>
> References: <T2qoID.A.xv.htXrCB_at_sol01.isp.gweep.ca>
> Subject: Re: NEC-LIST: World Radio Noise Maps
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> Dear Doug:
> I am under the impression that revised versions of the noise maps (in
> digital form) are used in the latest version of IONCAP, the most
accessible
> version of which is VOACAP. (Available from:
> http://elbert.its.bldrdoc.gov/hf.html
>
>
> It has been decades since such critical information has been used in a
> graphical format. You do, however, pose a most interesting question.
>
> I shall try to fit in a bit of a look into my library.
>
> Warm regards, Mac
>
> J. Mc Laughlin; Michigan U.S.A.
> Home: JCM_at_Power-Net.Net
> University: JCM_at_Kettering.Edu
>
> "D. B. Miron" <dbmiron_at_paulbunyan.net> writes:
> > Good day,
> >
> > I have a copy of CCIR Report 65 "Revision of Atmospheric
> > Radio Noise Data", ITU, Geneva, 1957 which has maps of
> > average noise contours for six time blocks and four season,
> > and curves of average noise vs. frequency to go with them.
> > A search of the web and a reading and search of the ITU web
> > site indicates that the most recent such data is CCIR Report
> > 322, from 1963, but this doesn't seem to be available
> > anywhere. I did find an ITU Opinion that there are errors
> > in 322 which ought to be fixed. Whatever their utility, I
> > think a sample of these maps and curves has instructional
> > value.
> > 1. Is the data in 322 significantly different than the data
> > in 65?
> > 2. Is there an electronic version of these maps anywhere?
> >
> > Thanks,
> > Doug Miron
> >

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