The tests will take place for six hours per day (from 9:30 am to 3:30 pm) on June 7, 9, 21, 23, 28, and 30th. During this time, the jamming is expected to affect aircraft that are flying above 50 feet. The FAA didn’t share many details about the tests, but the military seems to be testing devices that can intentionally interfere with an enemy’s GPS system.