Conceived partly as a money-saving effort, the program's data are less precise than military imagery but easier to share with allies or civilian agencies.

WSJ: U.S. to Trim Commercial-Satellite Use

Precise data are not available on the total number of people who have been infected because it is difficult to ascertain how many get a mild form of NCoV.

CNN: Second case of challenging virus reported in France

Aircraft equipped with ADS-B are able to automatically send highly precise data, such as aircraft positioning and speed, to air traffic controllers every second.

BBC: The key to preventing lost planes

But users sharing their precise, real-time locations are liable to have very high expectations about how securely that data is transmitted and stored.

FORBES: Watch Out: Check-in Apps Share Your Location With More People Than You Think