Crystal oscillators are used in aerospace to form an efficient communication system;The communication

 system can be used for navigation objectives of navigation systems and electronic information warfare.

        In the research and measurement, crystal oscillator is mostly used for celestial navigation and space 

tracking purposes.

       Avionics equipment is an important part of aircraft, space station, satellite and so on. Each electronic 

equipment needs crystal oscillators of different frequencies to provideClock signal, crystal oscillator failure

equipment can not continue to work;Typical avionics include: airborne computer, airborne radio, inertial

 navigation, airborne radar, aircraftOn-board communication, on-board power module, etc.