A data visualization map showing those activities allowed anyone viewing them to see exercise patterns such as run routes and also to zoom in on many of the internal layouts of military bases.
https://globalnews.ca/news/4184104/pentagon-ban-huawei-zte-military-bases-canada/
since I been tracking the ZTE phone I had through the Air-Field.
The phone would turn on at entry into restricted area.
This article
sheds a bit of light on how I believe china spies. picks up certain Radio waves. like from a control tower or airplane.
just my opinion from the research.