Yeah, I imagine there could be a few different sensors that fit in balloon payload that aren't in their satellites, but then not having a lot of control of its flight path and being very obvious makes it a bit of a strange option for gathering military intelligence?Someone mentioned to me that it has ground penetrating radar.
Sorry folks, these kinds of things are not benign. Regardless of the type of data returned, AI can use it to develop an accurate model.
Maybe it was a literal test balloon to see what the response would be?
There is a book I read about an EMP attack from N. Korea and Iran called One Second After which is making me think a little...