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Re: NOAA warning for rf communications

  • From: Owen DeLong
  • Date: Sun Oct 26 13:51:11 2003


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 <[email protected]> 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 ;-)
>
>
>