
Astrionics is the science and technology of the development and application of electronic systems, sub-systems, and components used in spacecraft. The electronic systems on board a spacecraft include attitude determination and control, communications, command and telemetry, and computer systems. Sensors refers to the electronic components on board...
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http://en.wikipedia.org/wiki/Astrionics

electronics as applied to space flight
Found on
http://phrontistery.info/a.html

the science dealing with the application of electronics to astronautics.
Found on
https://www.infoplease.com/dictionary/astrionics
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