Tom Clancy wrote about something very similar in “Rainbow Six” if I remember correctly. They used the technology to track the bad guys in a Amazonian Rainforest. They were able to direct the ‘good guys’ precisely to where the ‘Bad Guys’ were hiding out.
"Advanced algorithms isolate the tiny signals from a person's moving chest by filtering out other signals, such as those from moving trees and animals."
Life imitates art