Cassidian:
http://www.cassidian.com/en_US/web/g...ns%20invisible
Stealth: in airplanes it gets acchieved by materials as well as geometry of surfaces that is designed to disperse incoming radar beams and to reflect them at directions where they do not reach back to the active radar station sending the beam.
But these planes are moving inside a constantly present, artificial, active electromagnetic environmentdue to modern infrastructure, bombarding their surfaces FROM EVERY ANGLE, that is why
they are also reflecting at every angle. The reflceting energy levels may be low, but are such that Cassidian now seems to be able to catch them up.
At the same time, it does not give away Cassidian's presence and activity mode.
The military relevance should be obvious.