[64471] in North American Network Operators' Group
Re: NOAA warning for rf communications
daemon@ATHENA.MIT.EDU (Keptin Komrade Dr. BobWrench III e)
Fri Oct 24 09:51:54 2003
Date: Fri, 24 Oct 2003 09:49:27 -0400
From: "Keptin Komrade Dr. BobWrench III esq." <bownes@web9.com>
To: Owen DeLong <owen@delong.com>
Cc: Todd Vierling <tv@duh.org>, Roy <garlic@garlic.com>,
Chris Yarnell <cdy@kooks.net>, nanog@merit.edu
In-Reply-To: <11270000.1067000480@odlaptop>
Errors-To: owner-nanog-outgoing@merit.edu
Well, this is more than you really wanted to know, but....
ELV Exremely Low dc - 3khz
VLF Very Low Freq 3khz - 30khz
LF Low Frequency 30khz - 300Khz
MF Medium 300Khz - 3Mhz
HF High 3mhz-30mhz
VHF Very High 30mhz-300mhz
UHF Ultra High 300-3Ghz
SHF Super High 3Ghz - 30 Ghz
EHF Extremely High 30Ghz - 300Ghz
Different folks put the breaks at slightly different places (the.g. the
amatuer radio community puts the hf/vhf break @ 50Mhz and the MF/HF
break @ 1.8Khz.
And, as a side note, I can't find the URL, but the US Cong is talking
about pulling all the funding for the NASA space weather programs. Would
mean less/no warning of this sort of stuff.
We now return you to our regularly scheduled off topic discussions
Komrade
Owen DeLong wrote:
> This will not likely affect point-to-point line-of-site communications
> above 50Mhz.
> It will likely affect non-terrestrial communications and HF
> communications depending
> on ionospheric reflection.
>
> Owen
>
>
> --On Friday, October 24, 2003 07:15:29 AM -0400 Todd Vierling
> <tv@duh.org> wrote:
>
>>
>> On Thu, 23 Oct 2003, Roy wrote:
>>
>> : "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.
>>
>> "High frequency communications"?
>>
>> We *are* talking about multi-GHz frequencies here.
>>
>> --
>> -- Todd Vierling <tv@duh.org> <tv@pobox.com>
>
>
>
>
