Thats a great and real challenge to answer. IMO stealthiness is a great hype and PR. I discussed with Serbian military whom I met at an exhibition. They claimed that they shot down the F-117 Nighthawk with old analogue technology and it was not a lucky hit. This people are active in technology development and claimed that they are able to to paralyze a whole city GSM network with a sneaky - network of at least 6 old GSM Nokia mobiles.
Lets assume that a state has specific algorithms and can analyze all broadcast signals,
what would happen if anomalies are detected ?
"The GSM specification itself is good to a maximum of about 20 miles (with the strongest tower implementations), and the handset power is limited to 2W in the 900MHz band and 1W in the 1.8GHz band. There is no GSM system imposed limitation on altitude, it'd just be a matter of getting and maintaining a good signal."
Bro. Please do it. I am a marked usual suspect and want not create a discussion about me. But I can contribute also to other interesting topics - location, idendification of people and objects. But I will only contribute open source infos, despite the fact I know reality.