Originally Posted By: piston79
Originally Posted By: Alien_MasterMynd
Another question: is GSN, while missile is in flight, somehow capable to withstand VGPO jamming? Maybe false doppler frequency can drop to zero....


For what I managed to find - yes, but the mechanism of this is in RPC, as missile has not enough "brain" to do it...
Could you explain your second sentence? I didn't get your point... sigh


Let's imagine the following situation:
- Target is not jamming and is being tracked by RPC.
- Missile is launched
- While missile is flying towards the target, the target will start VGPO jamming
- what will happen in this situation as missile is guided by its own GSN, will it maintain lock?

The second sentence: for example high speed target is flying away from SAM site while missile is still climbing, so the part of its speed vector in direction to the target is low, and thus GSN receives negative doppler velocity (missile is climbing yet, so its closure rate to the target is negative yet).
The target starts VGPO jamming, it will send false return signal with increasing frequency. At one moment, false doppler velocity will be very close to zero and zero at all. Does it break the GSN's lock? The question is how fast the false doppler velocity will cross the filtered "forbidden zone" across zero. And in any way, since the missile is supposed to fly, does it have the "forbidden zone" across zero implemented like the stationary RPC?