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Experiences what its like to be in person at Kennedy Space Center for a Rocket launch! This is 7 miles from the launch site, notice how it takes about 20 seconds for the sound to catch up!
Wait for the double sonic booms at the end (@~8:05 and 8:13)
“Double” Booms - from Nasa.gov
All aircraft generate two cones, at the nose and at the tail. They are usually of similar strength and the time interval between the two as they reach the ground is primarily dependent on the size of the aircraft and its altitude.
While some people on the ground may perceive the sound as a single sonic “boom,” many sonic booms produced from NASA’s research flights are easily heard as distinct “double” booms, similar to what was created by the space shuttle. This is the result of the two separate cones generated, at the nose and the tail of the aircraft.
www.nasa.gov/centers/armstron...