The jammer would be in the warhead bus, numbskull, not in the actual warhead vehicle, and it would not require much of a space or weight penalty. The warheads themselves would have and be accompanied by their own pen-aids.MKSheppard wrote:Actually, I would love to see you fit a jammer into a re-entry vehicle, competitingPatrick Degan wrote:It makes a considerable difference, because jammers directly affect the ability of the system to target objects in the flight path
with all that limited space for:
A Nuclear Device
Heat Shielding
Batteries
Radar Altimeter
et cetera.
If putting a jammer onto your re-entry vehicle forces you to go from 100 kt to 50 kt, the Defense has shot down 50% of your warheads even before the war has started.
Actually, they do:Actually, they don't.while decoys complicate the problem of hitting actual warheads by several orders of magnitude.
Stuart Slade, Defense Industry Analyst:
Blast a load of jello out the front of an interceptor so that it has higher velocity than the interceptor itself. The first thing that happens is that all the water evaporates so we are left with a cloud of fine but very hard particles in a shotgun blast. That'll act as a sorting mechanism. Balloons etc will get shredded by the blast, relatively solid RVs wont be affected. So the interceptor following can see what is solid and what isn't. Thats one of the technologies used. Jello is good because it disperses evenly while something thats solid to start with (sand for example) clumps.
And:This point may serve as a worst-case scenario, but as more and more countries obtain nuclear power, serious consideration must be taken in this matter. However, using the current infrared sensors as detection of warheads has been a failure thus far. In the recent interception test that took place in July, the mock warhead that was launched contained inexpensive mylar balloons that can fool the infrared sensors. In order to be effective in stopping the kill vehicle, these balloons must be as bright as or just brighter than the light released by the warhead. A warhead would generally be hiding with up to hundreds of decoy balloons making the warhead difficult to stop. However, the test that was performed did not prove anything. The only decoy balloon that was launched with the warhead had a brightness level much different from the warhead meaning that it would have been difficult for the infrared sensors to be confused by it. Secondly, the balloon did not inflate during the test, making the test a complete failure. Ted Postol, MIT physics professor, says that the infrared sensors on its kill vehicle could not discriminate between warheads and other countermeasures. (Deflated Missile Defense, 2000).
We covered this topic before. I guess we're again dealing with your evident learning difficulty here.
Nuclear warheads with antisimulation balloon decoys. A nuclear warhead could be hidden within an aluminum-coated mylar balloon and released together with a large number of empty balloons, as illustrated in figure 4. Such "antisimulation"--making a warhead look like a decoy--could be easier and more effective than making decoys look like warheads. The technique is particularly useful against the exoatmospheric interceptors planned for the NMD system: Because light and heavy objects travel on the same trajectories above the atmosphere, large numbers of effective decoys could be added to a missile without a prohibitive weight penalty. Simple techniques can be used to deny the defense system sensors any distinguishing physical signal that would show which balloon contains a warhead. For example, balloons could be given slightly different temperatures, either passively, by using surface coatings with different emissivities (figure 5), or actively, by using small battery-powered heaters.
Reducing target visibility
Nuclear warheads with cooled shrouds. An attacker could enclose a nuclear warhead within a double-walled cone containing liquid nitrogen to hide it from the EKV's infrared sensors (see figure 6). Cooling the outer cone to 77 K would reduce the infrared radiation emitted by the shrouded warhead by a factor of at least a million. While the shrouded warhead would still be seen by the NMD system's X-band radars, the kill vehicle would be unable to detect the warhead in time to maneuver to hit it.
Which refutes the argument on this point... how, exactly?Actually, it does. As the distance to target increases, the higher your ballistic trajectory is with wingless missiles.There's a damn good reason the Soviets kept sending SSBNs into the middle of the North Atlantic ocean even after they had acquired the capability to strike all US targets with a Typhoon or Delta III sitting at pierside in Polarnyy.And a boomer does not have to travel all the way to the enemy's coast to launch its weapons in sufficent range to reduce response time.
It was so they could reduce time to impact to just oh, 15 minutes for me in the vinicity of Washington DC.
Red Herring Fallacy. Yet another one for your record.They even had a land-attack mode for their nuclear-tipped SUBROCskis that would have allowed a warning time of only 5 minutes, but would have required them to get within ~45 km of the coast.
Oh really:Do you have any idea how much of a heat sink a ballistic missile is? That massive launch plume will show up on virtually any infrared sensor worthy of it's designation, and even after the engine has burned out, there will remain a massive amount of heat on the missile itself which cannot be radiated away fast enough.SBIRS does not erase this problem, no matter how much you dearly wish to believe it does. The fact that it remains an important problem in the planning of NMD demonstrates this.
From Appendix B to the UCS/MIT report Countermeasures: A Technical Evaluation of the Operational Effectiveness of the Planned US National Missile Defense System, accessed through the .pdf link at the site linked above. And unless you're going to try to make the ludicrous statement that the warhead bus would be dragging its carrier missile along with it after its discarded its stages in flight, the issue of the heat from the booster is a non-starter.Medium- to Long-Wave Infrared and Long-Wave Infrared Sensors
Sensor Resolution. According to the laws of physics, the diffraction-limited angular resolution of a sensor is given by λ/δ, where λ is the wavelength of the radiation the sensor detects and δ is the diameter of the sensor aperture. For a medium-wave infrared sensor with an aperture diameter of 0.5 meters, the diffraction-limited angular resolution would therefore be roughly 4μm/0.5m=8μrad. At a target range of 1000 km, its resolution would be about 8 meters. For a long-wave infrared sensor with the same aperture diameter, the diffraction-limited angular resultuion would instead be roughly 10μm/0.5m=20μrad. At a target range of 1000km, its resolution would be about 20 meters.
Thus the spatial resolution of the medium- to long-wave and long-wave infrared sensors will be too poor to allow any imaging of a warhead-sized object (with dimensions of roughly 2 meters); instead these sensors will see all midcourse objects as point-emitters. The sensors will also be unable to resolve closely spaced objects and will therefore not be able to observe the deployment of countermeasures (such as balloons) in any detail.
Aimed at an object travelling far slower than an ICBM warhead and therefore irrelevant to this or any discussion on the subject before the bar. Which was part of a system ultimately cancelled as technically useless to the mission of stopping a mass-warhead attack on CONUS. You have no argument.With a system that was not designed for skin to skin-hits, using the technological equivalent of a giant ESTES model rocket.It is no such indication at all. And it's already been pointed out that Nike-Zeus intercepted a missile which had a velocity one-fifth that of an ICBM warhead in transit.
Uh huh:Actually...And I've looked at PAC-3 and nowhere has anybody made the farsical claim that it's mission is analogous to an ICBM intercept. Either you are ignorant of this or you are dishonestly conflating the two concepts to support an increasingly threadbare argument.
Link
A missile enters the terminal phase when the warhead falls back into the atmosphere. This phase generally lasts from 30 seconds to one minute.
The primary elements in the Terminal Defense Segment are:
* Terminal High Altitude Area Defense (THAAD)
* PATRIOT Advanced Capability-3 (PAC-3)
* Arrow, a joint effort between the U.S. and Israel
* Medium Extended Air Defense System (MEADS), a co-developmental program with Germany and Italy.
I suppose you are simply too stupid to understand the fundamental difference between strategic ICBM warheads and short-range tactical ballistic missiles.
Home :: Missile Defense Systems
Patriot Advanced Capability-3 (PAC-3)
Country: USA
Basing: Land
Status: Deployed
Details
Patriot Advanced Capability-3 (PAC-3) is a surface-to-air guided missile defense system that builds upon the existing Patriot air defense infrastructure (used most notably during the Persian Gulf War in 1991). The new fully operational PAC-3 provides advanced capability against enemy cruise missiles, aircraft, and unlike previous systems, tactical ballistic missiles.
Not by the people at Bell Labs:It was considered by defense analysts and discarded...in the 1960s.Riiiight —as if a potential enemy would never consider dedicating a 1MT warhead for the purpose of radar-blinding. Are you really this obtuse?
Take particular note of the quote at the top of page four of the memorandum: "They (Bell Labs engineers) said the Minuteman defense could be overwhelmed or defeated by blacking out the radars". And that was in 1974.
And as I said the last time you threw this up, the quote a) deals with assumptions pre-MIRV and as is pointed out in the very passage b) based on assumptions which were purely speculative on paper. And just to remind you:Page 211 of SoF
A rococo elaboration was the "ladder-down" attack. The offense would explode a warhead just inside the atmosphere to blind the defender's radar; then a second warhead would drop through the blob of the first and be fired; then subsequent warheads would repeat the sequence, climbing down to the target, which would be nailed by the final blast. Well, no attacker would believe that warheads could be located and exploded with such split-second precision at intercontinental range. Even if he could, high virtual attrition had been imposed on him. And defensive tactics were easy: Early-warning radars would identify the attack, and exoatmospheric interceptors would break it up in space. A ladder-down attack in the atmosphere would be foiled by firing an interceptor with proximity fuse through a blob to kill the successor warhead. Although taken seriously by some consultant scientists circa 1960, ladder-down tactics were merely a curiosity of the paper wars.
Take particular note of the quote at the top of page four of the memorandum: "They (Bell Labs engineers) said the Minuteman defense could be overwhelmed or defeated by blacking out the radars". And that was in 1974.
Page 211 of SoFFor the fifth or sixth time in the course of this thread —the problem is not whether the hardware is protected from EMP but rather the phenomenon of EMP-induced atmopheric ionisation which scatters or blocks radar signals. This was one of the factors which killed Sentinel and Safeguard back in the 70s.
And defensive tactics were easy: Early-warning radars would identify the attack,
and exoatmospheric interceptors would break it up in space. A ladder-down attack in the atmosphere would be foiled by firing an interceptor with proximity fuse through a blob to kill the successor warhead. Although taken seriously by some consultant scientists circa 1960, ladder-down tactics were merely a curiosity of the paper wars.
Take particular note of the quote at the top of page four of the memorandum: "They (Bell Labs engineers) said the Minuteman defense could be overwhelmed or defeated by blacking out the radars". And that was in 1974.
Nowhere near as sad as the spectacle of you making a rank fool of yourself by denying the fact that people far more learned than you had not rejected this "crap" about nuclear-blinding at all. Namely, the engineers at Bell Labs, the primary contractor for Safeguard.It's sad to see you spouting crap that was rejected fourty years ago by people
more learned than you.