|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: NOAA warning for rf communications
Need more info go here http://www.spaceweather.com/ it has a embeded link that explains affects on communications too. -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Scott Granados Sent: Monday, October 27, 2003 12:32 PM To: Owen DeLong Cc: Roy; Chris Yarnell; [email protected] 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 > <[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 ;-) > >> > > >> > > >> > > >> > >> > > > > >
|