A CNN article quotes a former intelligence official stating it could be picking up cell phone and radio traffic. How would it be monitoring cell phone traffic? I thought that stuff was encrypted. Are they breaking AES or something?
I think you are right on.
Trying to listen to cellular traffic from 90,000 feet would be a total mess because it would hear so many sites on the same frequencies.
Military traffic, other system, I don't think it would be as successful as some might think. And there's no logical reason to do that with a balloon when it's easily done with people on the ground.
Getting any intelligence back to where it would be used would require a satellite link, so just use a satellite in the first place.
Only benefit I could see would be for aerial photography. There would be a benefit to not having so much atmosphere between the camera and the ground, like with a satellite. But again, using adaptive optics, there's ways around that with satellites, plus satellites are not at the whim of the jet stream and are flying overhead all the time. The capability of military satellites far exceeds what you'd get off Google Earth, or so we are told. But if we have it, it's likely they have it, and wouldn't need to send something as slow and poorly maneuverable as a balloon.
Maybe there was some nefarious plan, but I cannot imagine what they would gain from a balloon that couldn't be gathered some other way without the mess they created.
Gauging response to infiltrating aircraft? A balloon in no way acts like an aircraft or missile. Anyway, it's easier just to watch how the military responds in any other part of the world where we're doing that kind of stuff. No need to do it from a 90,000 foot high balloon. Hell, the Russians test that all the time.
No matter what happens, whatever they'll recover from the ocean off South Carolina will tell them what they need. And no matter what the military says, there will be those that claim we are not being told the truth and it's all a secret cover up. This will all set them spinning for the next 20 years.
I think I need to invest in aluminum. The market for custom foil hats is about to go through the roof….
If anything, this achieved setting up more panic and doubt, which does more to destabilize things that any weapon could. The "deep state" and conspiracy theory nut jobs are doing exactly what the Chinese want them to do.