APG-81 Corporate Video

**Chogy** · 27 May 11,, 13:32

We all know what the acronym RADAR stands for. Even a modest jammer shortens it to RAD... drops the "and Ranging". The target is somewhere along that azimuth and elevation. You launch your missile... unless it literally flies along the beam, the chances of it hitting the target are very low, and most missiles do not carry the hardware and software to revert into a true HARM or anti-radiation mode, which don't work well with fast moving targets anyhow. A jammer says "I'm out here, but I dare you to figure out exactly where." If the jamming platform can live with that, all is good.

Besides, modern "jammers" are more like spoofers. They analyze and copy the incoming radar signature in pulse width, frequency, etc, then return it in that exact form, but skewed enough so the radar sees a false target, multiple false targets, noise, or some combination.

**GGTharos** · 28 May 11,, 17:10

Originally Posted by NUS

Whatever. But what's the point?

Because there was a question. Why not? What's the problem with it?

I don't understand what are you talking about. Why would fighter cover could not follow bomber?

Because the bomber far, far out-ranges the fighter cover.

Yes, tank can sink a submarine. Under certain conditions. So what?

So your comparison is crap. There are no tanks or submarines here. Specifically, there are aircraft with air to air capability, and are thus comparable. They might be designed for different A2A scenarios, but that isn't stopping you from making a comparison that can easily be valid. Are there wartime scenarios where MiG31's could run into F-22's? There sure are. What about Su-34's running into F-15's? You bet.

I do admit, i don't know much about how HOJ works.

No one -really- knows. HoJ depends on exploiting the other guy's jammer, and that in turn depends on you knowing how that jammer works, and your missile or aircraft sporting a good enough processor to exploit any known problems ... which depends on the opposition not having fixed said glitches. Like Chogy said, at minimum you'll lose azimuth or elevations, sometimes both. That's enough to kill off a missile seeker, and DECM goes even further in denying a lock. You go STT, it goes 'bzot' and your radar gives up. An SPJ will usually only activate when it senses a threat (ie. STT on self) and attempt to jam that threat. And it can be very effective, or not at all. How does HoJ fit into this? Who knows. SPJ's aren't noise-jammers. They can't be, and besides, there are ways for a fighter to overcome that to attack the jammer. Either way, if the jammer fools your radar, HoJ won't help much because pretty much all of your ECCM has failed.

Was F-22 jamming someone at the same time? If he did, it would compromise his stealth, that's the point i'm trying to make.

Maybe, maybe not. We won't be told, but if it was, chances are its stealth was already 'compromized', and thanks to its very low RCS (ie. stealth) its jamming was ridiculously effective, and it was ruining everyone's day even though they knew it was there. And like Jimmy said, if the jamming was offensive, you wouldn't know what's happening to you anyway - you might not be able to tell there's jamming happening. You can't always follow a jammer to its source. It just doesn't work that way; there are ways to deceive direction and range finding devices like RADAR and RWR, and jammers exploit all of that.