RE: NOAA warning for rf communications

["Graham, Darel R." <darel.graham () mci com>]

Need more info go here http://www.spaceweather.com/
it has a embeded link that explains affects on communications too.


-----Original Message-----
From: owner-nanog () merit edu [mailto:owner-nanog () merit edu]On Behalf Of
Scott Granados
Sent: Monday, October 27, 2003 12:32 PM
To: Owen DeLong
Cc: Roy; Chris Yarnell; nanog () merit edu
Subject: Re: NOAA warning for rf communications



Just to add, it seems that I over extended the hf band the cut off as was
correctly pointed out was 30 mhz I believe.

And if anything since friday the vhf band seems improved, 2 meters has
been quite good.

I'd say that I have not noticed any disruption although I've heard tell of
disruptions in the gps network I haven't experienced them personally.


On Sun, 26 Oct 2003, Owen DeLong wrote:

> It means HF in the traditional sense of the word.  The cellphone issue
> is due to the use of satellite links to many cells.  There is no reason
> to believe that line of sight (LOS) communications VHF and above are
> likely to be impacted by these events as long as they are not depending
> on ionospheric propogation.
>
> HF depends on ionospheric bounce.  Satellites depend on the signals
> being able to penetrate the ionosphere.  Both of these will be
> effected.  Terrestrial microwave and VHF line of site, 802.11,
> 2.4GHz cordless phones and the like do not.
>
> Owen
> KB6MER
>
>
> --On Friday, October 24, 2003 9:31 AM -0700 Scott Granados
> <scott () wworks net> wrote:
>
> > Wouldn't 2.4 ghz fall in that range or does hf mean hf in the classical
> > sense of something on the scale of 3 to 49 mhz or so.
> >
> >
> > On Thu, 23 Oct 2003, Roy wrote:
> >
> > > According to the notice
> > >
> > > "Satellite and other spacecraft operations, power systems, high
> > > frequency communications, and navigation systems may experience
> > > disruptions over this two-week period."
> > >
> > > I think you will find that 802.11b and other terrestrial microwave LOS
> > > links don't meet any of those criteria and should be unaffected.  Some
> > > small increase in the noise level may be detected.
> > >
> > > Chris Yarnell wrote:
> > >
> > > > my office experienced 802.11b weirdness (sudden bouts of 0% signal
for
> > > > no apparent reason) earlier this week. i'm fully expecting more
> > > > tomorrow. :)
> > > >
> > > >
> > > > > There is a high likelihood that things like 802.11, licensed and
> > > > > unlicensed microwave links, and certainly satellite links will
sustain
> > > > > interference over the next few days. I assume that everyone on the
> > > > > list is both aware, and prepared ;-)