![avionics subsystem and hardware](https://www.nasa.gov/wp-content/uploads/2023/03/184571-004_3.jpg)
NASA, Orbital ATK Prepare for Second SLS Booster Ground Test
The avionics subsystem and hardware is checked out at one of Orbital ATK’s test facilities before the successful Sept. 22 off-motor hot-fire test.
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https://www.nasa.gov/image-detail/nasa-orbital-atk-prepare-second-sls-booster-ground-test/
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