NOAA warning for rf communications

Owen DeLong owen at delong.com
Sun Oct 26 18:45:07 UTC 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 
<scott at 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 ;-)
>> >
>> >
>> >
>>
>>
>





More information about the NANOG mailing list