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Really Horrible SW conditions for the last 6 months
In years past, I could pick up WBCQ 7.415 here in NYC... al night long. Now it evaporates into static at about 22:00 U.T.C. Many other stations such as BBC on 5.975 from Antigua are coming in poorly , if at all. Has there been some big, long lasting solar disturbance over the past few months ; or a Change in the Ionosphere Etc?? Any information or links to same would be appreciated. Thanks Dan / NYC |
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wrote in message oups.com... In years past, I could pick up WBCQ 7.415 here in NYC... al night long. Now it evaporates into static at about 22:00 U.T.C. Many other stations such as BBC on 5.975 from Antigua are coming in poorly , if at all. Has there been some big, long lasting solar disturbance over the past few months ; or a Change in the Ionosphere Etc?? Any information or links to same would be appreciated. Thanks Dan / NYC We're getting close to the bottom (worst) of an 11-year cycle. After we bottom out, things will start to get better again (in theory at least!) Mark. Auckland New Zealand. |
Found a link to a picture..describes Propagation by frequecy; etc.. http://www.ips.gov.au/Main.php?CatID...ospheric%20Map - My question is: WHY has propagation been so Fu*k*d up.. during the last year?? ?? |
It is a scientific fact recently discovered, that the earth's magnetic field
is steadilly weakening. They think it is because the polarity of the field is changing: they call it a "reversal". Be that as it may, it is my feeling that it is real and causing shortwave reception to degrade because the ionosphere is affected by the magnetic field. I used to think that the magnetic field was quite uniform, unmoving and static but scientists have found that is not the case at all. Bottom line is that charged particles react to magnetic fields. The reflective layer is a layer of particles of the atmosphere that results from solar radiation of many forms stripping electrons off the particles. Think of the layer of charged particles as a mirror. If the mirror is in a quiet stream, light reflecting off the mirror will be uniform. If the stream is ruffled or full of eddies and the bottom is full of rocks, the light will be disturbed by the stream and not uniform at all. If the light in the analogy is the radio energy (radio waves if you like), then any ruffling or movement in the layer is going to ruffle the signal too, so it may fade in and out or be fluttery or full of static and so on. If the magnetic field of the earth is moving and changing a lot in different ways in different places, a lot of radio energy is either being lost into space or absorbed. It is a bit like two people holding a big sheet of aluminum foil between them and moving it around in the sun. If the foil is held still, the stream of reflected light is quiet and steady, but if the foil is moving around in a stiff wind, the light will go all over the place, not necessarilly into the viewer's eyes. This may be just temporary, or it may be a long term effect, but one thing is certain, the environment in which we live is affected by physical forces in continual flux. If the "reversal" occurs in our lifetime, it may get very interesting. The same magnetic field on which we have come to rely for communications also protects the planet from harmful radiation such as x-rays and ultraviolet light. That means if the field diminishes or disappears, so will our protection from radiation. You can find a lot on the internet about the subject of pole reversals if you want to study the subject. ~~~~~ God gives peace not war + wrote in message oups.com... Found a link to a picture..describes Propagation by frequecy; etc.. http://www.ips.gov.au/Main.php?CatID...ospheric%20Map - My question is: WHY has propagation been so Fu*k*d up.. during the last year?? ?? |
I found one bit you can read about reversal of earth's magnetic field:
http://uplink.space.com/showflat.php...ro&Number=2107 ~~~~~ God gives peace not war + "ShortwaveMan" wrote in message ink.net... It is a scientific fact recently discovered, that the earth's magnetic field is steadilly weakening. They think it is because the polarity of the field is changing: they call it a "reversal". Be that as it may, it is my feeling that it is real and causing shortwave reception to degrade because the ionosphere is affected by the magnetic field. I used to think that the magnetic field was quite uniform, unmoving and static but scientists have found that is not the case at all. Bottom line is that charged particles react to magnetic fields. The reflective layer is a layer of particles of the atmosphere that results from solar radiation of many forms stripping electrons off the particles. Think of the layer of charged particles as a mirror. If the mirror is in a quiet stream, light reflecting off the mirror will be uniform. If the stream is ruffled or full of eddies and the bottom is full of rocks, the light will be disturbed by the stream and not uniform at all. If the light in the analogy is the radio energy (radio waves if you like), then any ruffling or movement in the layer is going to ruffle the signal too, so it may fade in and out or be fluttery or full of static and so on. If the magnetic field of the earth is moving and changing a lot in different ways in different places, a lot of radio energy is either being lost into space or absorbed. It is a bit like two people holding a big sheet of aluminum foil between them and moving it around in the sun. If the foil is held still, the stream of reflected light is quiet and steady, but if the foil is moving around in a stiff wind, the light will go all over the place, not necessarilly into the viewer's eyes. This may be just temporary, or it may be a long term effect, but one thing is certain, the environment in which we live is affected by physical forces in continual flux. If the "reversal" occurs in our lifetime, it may get very interesting. The same magnetic field on which we have come to rely for communications also protects the planet from harmful radiation such as x-rays and ultraviolet light. That means if the field diminishes or disappears, so will our protection from radiation. You can find a lot on the internet about the subject of pole reversals if you want to study the subject. ~~~~~ God gives peace not war + wrote in message oups.com... Found a link to a picture..describes Propagation by frequecy; etc.. http://www.ips.gov.au/Main.php?CatID...ospheric%20Map - My question is: WHY has propagation been so Fu*k*d up.. during the last year?? ?? |
http://www.pbs.org/wgbh/nova/magnetic/reversals.html
The link above gives some information about pole reversals. ~~~~~ God gives peace not war + wrote in message oups.com... In years past, I could pick up WBCQ 7.415 here in NYC... al night long. Now it evaporates into static at about 22:00 U.T.C. Many other stations such as BBC on 5.975 from Antigua are coming in poorly , if at all. Has there been some big, long lasting solar disturbance over the past few months ; or a Change in the Ionosphere Etc?? Any information or links to same would be appreciated. Thanks Dan / NYC |
There was a TV documentary regarding the possibility of a magnetic pole
reversal and its effects on either PBS or the Discovery Channel about a year ago. There's proof of fluctuations, but no proof that a true reversal is happening... but it was agreed the earth is well overdue for one. "ShortwaveMan" wrote in message ink.net... It is a scientific fact recently discovered, that the earth's magnetic field is steadilly weakening. They think it is because the polarity of the field is changing: they call it a "reversal". |
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Thing is...The low bands are as good as it gets right now.
It's not a total bummer. When the MUF drops low, just drop frequency. The low bands are in the best shape, in the low part of the cycle. Being it's winter in NA, it's prime time for the low bands...Right now. Being I prefer low bands to high, I'm glad the solar cycle is where it is...:) Need more frigid arctic wx to kill the lightning in the US...MK |
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Actually, last night local time here in California (about 6:00 to 7:00Z
2/4/05) the bands were pretty hot. 41m and 49m were positively hopping. Austria on 6155 was much better than usual. 31m was better than it has been. 60m was not so great (although a Peruvian 5 kW station was banging in nicely), but it was a tad late in the evening here for most of them. Bruce Jensen |
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I blame the republicans for the weakening magnetic field
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"bpnjensen" wrote in message ups.com... Actually, last night local time here in California (about 6:00 to 7:00Z 2/4/05) the bands were pretty hot. Yes, 49 meter band jumping here in NE Oklahoma around 11:00 PM (central) or so. Rob Mills ~ |
wrote in message ups.com... I blame the republicans for the weakening magnetic field Nope, Teddy caused it with his ranting and raving. |
Last night (02-05)was better than it has been in weeks here in the Pacific
Northwest. Surprisingly good conditions - the best in two or three months. I've noticed a lot of day-to-day variation in conditions. When SW conditions are bad, I tend to switch to mediumwave. Or if I want to hear the BBC or VOA, go the web. Conditions generally over the next couple of years will only deteriorate as we get toward the bottom of the cycle, but there are still good days. |
Stranger_On_The_Bus wrote:
Last night (02-05)was better than it has been in weeks here in the Pacific Northwest. Surprisingly good conditions - the best in two or three months. I've noticed a lot of day-to-day variation in conditions. When SW conditions are bad, I tend to switch to mediumwave. Or if I want to hear the BBC or VOA, go the web. Conditions generally over the next couple of years will only deteriorate as we get toward the bottom of the cycle, but there are still good days. It depends on what bands you use. At solar minimum the lower shortwave bands can be very good while propagation on the higher ones tends to be poor to nonexistant. The downside of this effect is band crowding. The broadcasters have less spectrum to use and must therefore use more of the lower bands. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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