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#21
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Fading Signal: The Neglect of Electronic Warfare.
On Apr 8, 6:36 am, Eunometic wrote:
On Feb 16, 7:37 am, Mike wrote: Fading Signal: The Neglect of Electronic Warfare. Lexington Institute.http://lexingtoninstitute.org/1223.shtml When you consider how much money Americans spend on defense -- about $4 trillion so far in this decade alone -- it's amazing what a poor job we do of maintaining our military arsenal. In the years since the cold war ended, the Navy's fleet has shrunk by half to fewer than 300 ships, the Air Force's planes have "matured" to twice the age of the commercial airline fleet, and the Army has largely abandoned the production of heavy armored vehicles. There's a simple reason for all these signs of military decay: the threat went away. No peer adversary has taken the place of the Red Army or the Imperial Navy. I note that the USN Grumman EA-6B is being used to create a jammed space around ground US patrols in Iraq. The jamming prevents the detonation of improvised explosive devices. Presumably highly directional electronically shaped antenna create temporal grace around the patrol. The USAF apparently can't do this mission due to the degradation of this type of aircraft. The money is going into the occupation of Iraq. Eventually advanced tech will be needed, maybe to protect Taiwan for a little longer from a rapidly empowering China. http://icasualties.org/oif/IED.aspx IED Deaths by month, 1746 to April 1, 4024 total U.S. deaths, equal 43% of all dead are victims of IEDs. No number on wounded, but the given ratio is 16 wounded for each death. ie about 28k |
#22
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Fading Signal: The Neglect of Electronic Warfare.
"Jeff" wrote in message . com... The more sophisticated jammers only switch on when a signal is detected, hopefully quickly enough to stop a detonation. They'll make electronic garage door openers, radio type car alarm tags and a huge assortment of other things entertaining to use... -- William Black I've seen things you people wouldn't believe. Barbeques on fire by the chalets past the castle headland I watched the gift shops glitter in the darkness off the Newborough gate All these moments will be lost in time, like icecream on the beach Time for tea. |
#23
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Fading Signal: The Neglect of Electronic Warfare.
"Juergen Nieveler" wrote in message . .. BTW, do those jammers send white noise, or are they smart enough to fake a signal? Say, I build a small detonator from RC car parts, and it depends on the transmitter sending "left, right, left..." every 30 seconds, with a timer starting on every signal, counting down until the opposite side timer is started. With a white noise jammer, no signal gets through anymore, 30 seconds later you get *bang*... All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. The sequence is set by a row of five thumbwheels, each of ten digits. So you've got a million, minus one, possible combinations. I leave as an exercise for the reader the calculation of the linear recursive sequence necessary to trigger the thing prematurely... This, of course, assumes the security forces know the radio frequency and the FSK baud rate and frequency shift. White noise generators don't work once the bad guys get up to 'radio amateur' levels of knowledge of triggering technology... -- William Black I've seen things you people wouldn't believe. Barbeques on fire by the chalets past the castle headland I watched the gift shops glitter in the darkness off the Newborough gate All these moments will be lost in time, like icecream on the beach Time for tea. |
#24
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Fading Signal: The Neglect of Electronic Warfare.
On Apr 8, 7:41*am, "William Black"
wrote: "Juergen Nieveler" wrote in message . .. BTW, do those jammers send white noise, or are they smart enough to fake a signal? Say, I build a small detonator from RC car parts, and it depends on the transmitter sending "left, right, left..." every 30 seconds, with a timer starting on every signal, counting down until the opposite side timer is started. With a white noise jammer, no signal gets through anymore, 30 seconds later you get *bang*... All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. *The sequence is set by a row of five thumbwheels, each of ten digits. So you've got a million, minus one, possible combinations. I leave as an exercise for the reader the calculation of the linear recursive sequence necessary to trigger the thing prematurely... This, *of course, assumes the security forces know the radio frequency and the FSK baud rate and frequency shift. White noise generators don't work once the bad guys get up to 'radio amateur' levels of knowledge of triggering technology... Gibraltar was 20 years ago. They've learned a lot since then and deaths from IED's have dropped dramatically since the USN's EW experts have trained the soldiers to use the equipment correctly. "They called themselves "sand sailors," and they did their job well by reducing IED fatalities at their bases. Monthly U.S. troop deaths from IEDs have dropped since reaching a high of 90 in May to 17 last month, in part because of their efforts, the military said in awarding Bronze Stars to Dye and others." http://www.boston.com/news/nation/ar...ead_ied_fight/ BB I guess everybody has some mountain to climb. It's just fate whether you live in Kansas or Tibet... |
#25
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Fading Signal: The Neglect of Electronic Warfare.
"BlackBeard" wrote in message ... On Apr 8, 7:41 am, "William Black" wrote: "Juergen Nieveler" wrote in message . .. BTW, do those jammers send white noise, or are they smart enough to fake a signal? Say, I build a small detonator from RC car parts, and it depends on the transmitter sending "left, right, left..." every 30 seconds, with a timer starting on every signal, counting down until the opposite side timer is started. With a white noise jammer, no signal gets through anymore, 30 seconds later you get *bang*... All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. The sequence is set by a row of five thumbwheels, each of ten digits. So you've got a million, minus one, possible combinations. I leave as an exercise for the reader the calculation of the linear recursive sequence necessary to trigger the thing prematurely... This, of course, assumes the security forces know the radio frequency and the FSK baud rate and frequency shift. White noise generators don't work once the bad guys get up to 'radio amateur' levels of knowledge of triggering technology... Gibraltar was 20 years ago. They've learned a lot since then and deaths from IED's have dropped dramatically since the USN's EW experts have trained the soldiers to use the equipment correctly. "They called themselves "sand sailors," and they did their job well by reducing IED fatalities at their bases. Monthly U.S. troop deaths from IEDs have dropped since reaching a high of 90 in May to 17 last month, in part because of their efforts, the military said in awarding Bronze Stars to Dye and others." ---------------------------- Almost certainly the big drop was caused by training people how to spot the bloody things. Messing with the trigger mechanism is very much a secondary thing, the best solution is not to park next door to one... -- William Black I've seen things you people wouldn't believe. Barbeques on fire by the chalets past the castle headland I watched the gift shops glitter in the darkness off the Newborough gate All these moments will be lost in time, like icecream on the beach Time for tea. |
#26
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Fading Signal: The Neglect of Electronic Warfare.
BTW, do those jammers send white noise, or are they smart enough to
fake a signal? Say, I build a small detonator from RC car parts, and it depends on the transmitter sending "left, right, left..." every 30 seconds, with a timer starting on every signal, counting down until the opposite side timer is started. With a white noise jammer, no signal gets through anymore, 30 seconds later you get *bang*... But that is not a system that you would want to use for real, any kind of failure or signal interuption would cause a detonation. All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. They certainaly could jam the signal, what they could not do eaisly is detonate the device when they wished. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. The sequence is set by a row of five thumbwheels, each of ten digits. So you've got a million, minus one, possible combinations. I leave as an exercise for the reader the calculation of the linear recursive sequence necessary to trigger the thing prematurely... This, of course, assumes the security forces know the radio frequency and the FSK baud rate and frequency shift. White noise generators don't work once the bad guys get up to 'radio amateur' levels of knowledge of triggering technology... White noise will *allways* work as long as you can get a loud enough signal, its just a matter of power and range. However, the more intelligent jammers use other signal patterns to jam known types of transmission, and "look through" their own transmissions to analyze the target signal. Jeff |
#27
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Fading Signal: The Neglect of Electronic Warfare.
All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. They certainaly could jam the signal, what they could not do eaisly is detonate the device when they wished. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. The sequence is set by a row of five thumbwheels, each of ten digits. As a matter of interest the bomb intended for Gibraltar was NOT radio controlled, it was a timer device that was found in the car (still in Spain). The SAS did not know this, however, and were acting on what had become common practise for the IRA in N Ireland from the mid 70's, which was to use radio control. Jeff |
#28
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Fading Signal: The Neglect of Electronic Warfare.
On Apr 8, 11:59 am, BlackBeard wrote:
On Apr 8, 7:41 am, "William Black" wrote: "Juergen Nieveler" wrote in message ... BTW, do those jammers send white noise, or are they smart enough to fake a signal? Say, I build a small detonator from RC car parts, and it depends on the transmitter sending "left, right, left..." every 30 seconds, with a timer starting on every signal, counting down until the opposite side timer is started. With a white noise jammer, no signal gets through anymore, 30 seconds later you get *bang*... All this stuff came out at the inquest into the people shot in Gib. The claim was made that the security forces should be able to jam the signal. They explained in some detail why they couldn't. It seems that the IRA people used a Trio Radio Amateur 144 MHz pocket radio system that requires a sequence of reversals transmitted by VHF FSK to trigger an open channel. The sequence is set by a row of five thumbwheels, each of ten digits. So you've got a million, minus one, possible combinations. I leave as an exercise for the reader the calculation of the linear recursive sequence necessary to trigger the thing prematurely... This, of course, assumes the security forces know the radio frequency and the FSK baud rate and frequency shift. White noise generators don't work once the bad guys get up to 'radio amateur' levels of knowledge of triggering technology... Gibraltar was 20 years ago. They've learned a lot since then and deaths from IED's have dropped dramatically since the USN's EW experts have trained the soldiers to use the equipment correctly. "They called themselves "sand sailors," and they did their job well by reducing IED fatalities at their bases. Monthly U.S. troop deaths from IEDs have dropped since reaching a high of 90 in May to 17 last month, in part because of their efforts, the military said in awarding Bronze Stars to Dye and others." http://www.boston.com/news/nation/ar...avy_specialist... BB I guess everybody has some mountain to climb. It's just fate whether you live in Kansas or Tibet... also, they don't drive down Ambush Alley as much. And the death rate is now nearly that of 2004, 207 died that year. |
#29
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Fading Signal: The Neglect of Electronic Warfare.
In message , William Black
writes "Jeff" wrote in message .com... The more sophisticated jammers only switch on when a signal is detected, hopefully quickly enough to stop a detonation. They'll make electronic garage door openers, radio type car alarm tags and a huge assortment of other things entertaining to use... You'll just have to wait for the HMMWVs to drive past before your car will unlock, your garage door open or your cordless phone ring. It's counterproductive to shut down a neighbourhood, you just need to prevent detonations within lethal distance. -- The nation that makes a great distinction between its scholars and its warriors, will have its thinking done by cowards and its fighting done by fools. -Thucydides pauldotjdotadam[at]googlemail{dot}.com |
#30
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Fading Signal: The Neglect of Electronic Warfare.
On Feb 15, 4:37*pm, Mike wrote:
Fading Signal: The Neglect of Electronic Warfare. Lexington Institute.http://lexingtoninstitute.org/1223.shtml When you consider how much money Americans spend on defense -- about $4 trillion so far in this decade alone -- it's amazing what a poor job we do of maintaining our military arsenal. *In the years since the cold war ended, the Navy's fleet has shrunk by half to fewer than 300 ships, the Air Force's planes have "matured" to twice the age of the commercial airline fleet, and the Army has largely abandoned the production of heavy armored vehicles. *There's a simple reason for all these signs of military decay: the threat went away. *No peer adversary has taken the place of the Red Army or the Imperial Navy. The decline of electronic warfare is harder to explain, because there the threat never went away -- it got worse. *Electronic warfare is the fight for control of the electromagnetic spectrum, the medium via which all of our communications and information systems operate. During the cold war, each military service nurtured a community of specialists adept at blocking or manipulating enemy transmissions while countering enemy efforts to do the same to us. *They jammed radars, disrupted command links, confused sensors and in general made it difficult for adversaries to employ any electronic device. When you're really good at electronic warfare, your enemy is nearly helpless. *He can't see, he can't hear, he can't even turn on the lights. *Electronic warfare is the reason why Syria's military didn't know it was under attack last year until Israeli bombs began exploding at its sole nuclear-weapons facility -- even though the jets dropping the bombs had to transit Syrian air space to get to the target. *Like cyber warfare, it's the kind of warfighting skill that only a technologically advanced country can be really good at, so you'd think U.S. military planners would want to exploit it for maximum leverage. Well, guess again. *Aside from the U.S. Navy and a small band of dedicated congressmen called the Electronic Warfare Working Group, this arcane specialty has become an orphan in the budgeting process. The Air Force walked away from electronic warfare when it decided that stealthy aircraft could be invisible to any radar (it later learned that wasn't entirely true). *The Army aborted plans to build an "aerial common sensor" that could find hostile emitters on the battlefield, only to discover that insurgents in Iraq were using cell phones and electronic bomb detonators to great effect. *And the Marines just stopped thinking about the subject. Well, the reason for that is simple. The Navy never actually diid Electronic Warfare. They still do what they did in WWII "Raster Warfare". Since sending a squadaron of jets to harass emeny positions, isn't electonic warfare, it's grid warfare. And the Air Force had to walk from electronic warfare. Since the idiots still don't understand that nothing is as stealthy as an electonic Satellite.. Since the "Radar" the idiots are evading, isn't radar, it's the media. The Navy held on, developing a replacement for the aging Prowler jamming plane called the Growler (a variant of the F/A-18 Super Hornet). *Part of the reason was that naval aviators weren't as impressed with stealth as their Air Force counterparts, and so they continued investing in other approaches to defending aircraft. *The Army has now rediscovered electronic warfare as a result of setbacks in Iraq, and has sent soldiers to train with Navy specialists. *But even the Navy has lagged in funding next-gen capabilities, which probably require unmanned aircraft that can get closer to hostile emitters. Perhaps the time has come to put the Navy in charge of all joint electronic warfare activities. *The other services don't have their acts together, and the Navy is less stressed at the moment than the ground forces. *That could change, but the problem right now is that a vital skill is being neglected, and the Navy may be the only service with enough expertise and imagination to keep it alive. |
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