A Meteor Detection Project Sat.
Microphones are in the tentacles.
If anyone tries to secretly test a nuclear weapon, anywhere in the world, the U.S. Department of Energy will know about it. Same goes for any large space rocks that try to sneak past our planet's natural defense system. The technology that monitors both of these potentially hazardous events is amazingly simple. A handful of microphones positioned around the United States listen for a telltale atmospheric pressure wave, a phenomenon that circles the globe at a frequency too low for the human ear to detect. A similar system is now under construction worldwide, designed to help monitor and enforce compliance with the Comprehensive Nuclear Test Ban Treaty.