My understanding of radio waves is that yes, they could indeed have jammed any electronics on the balloon if they were only RECEIVING. But it would have been virtually impossible for them to jam the balloon, if the balloon was TRANSMITTING.
Block transmission on every frequency from 120000ft? How?
Considering the ever increasing number of reports coming out about Chinese circuitry being used in almost all sensitive civilian and military infrastructure in North America, something like this sure does make one think about, you know, what if??
Although I guess, considering how saturated the planet is with gps/glonass signal, this thought experiment becomes mute, UNLESS it's on a frequency that doesn't travel well through the ionosphere...
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