A system is discussed for the instrumentation of infrasonic and hydromagnetic waves traveling through the atmosphere and the ionosphere. Two large missiles were used as the sources of energy. The advantages of the instrumentation system are: a minimum of manpower and time is required to calibrate and place the system into operation; the system is easily transported; and the system is very stable over long periods of time. A description of the missile engines as a moving source of energy in the infrasonic‐frequency spectrum (20–0.025 cps) was obtained. It is concluded that the instrumentation system has the capability of providing reliable data on long period waves and that the equipment is stable.