GGTharos, can you explain why the altitude of the target respective of the emitter affects whether you can notch or not?
AFAIK, the reason notching works is because the closing velocity of the target is reduced to the point where the software filters the contact out for doppler radar (does this to filter out ground clutter). Does LOMAC model selective application of the doppler filtering dependent on relative height of the contact?
Regardless, if your notch is not breaking the lock, TEWS should still be notifying the target that it is being tracked (or rather, that the frequency of emission from the emitting radar is staying within the parameters necessary to show it is locked).