Re: Military FAQ
netspider said:
What is radar lock-on in moderan air combat? What happens in a radar lock- on process? Can anyone explain the basic principles there not too much into physics and radar technologies?
I'll try, i hope other memebers will correct me if needed and provide a better illustration of the process.
Lets say we have plane A and plane B. we're in plane A.
Lock-on is when all of the following requirements have been fulfilled:
Our radar / OE sensor has detected plane B.
When our radar / other sensors have tracked plane B and identified it as a valid target. Finally,
when our radar has illuminated the target or when the IR sensor on our IR missile has acquired the target.
We have then achieved a lock on the plane B and we can then proceed with firing the missile.
One, however, doesn't need to fully illuminate the B plane with radar to use missiles with active radar guidance. It is enough to illuminate them enough for tracking purposes - exact distance of target, its speed, etc. That data is contuously monitored after launch and conveyed to the missile which is heading towards the target for trajectory corrections. At some point, depending on the radar in the missile, missile goes active and becomes fully autonomous. It if, of course, possible to turn around right after the launch and not transfer any further flight corrrection data to the missile but that lowers the chance of a hit. In a way, those missile use a form of lock-on after launch, where missile knows the general area where the target should be and use their radar, once they get in range, to lock onto it.
when reffered to lock on after launch most often it is meant in the context of short range IR guided missiles. What it basically means is that the plane feeds the info to the missile while still on pylon to launch where the general position of the target is. It may be behind the plane so the seeker cant see it or it can be far in front where seeker can't see it. IR missile is launched, possibly told to turn around where it will be able to see the target. The missile then, while in flight, detects the target (or it doesn't
) and independently locks on it. Chances of fratricide or successfully used decoys increase, of course.