Some spacecraft functions are best demonstrated by testing a group of components or assemblies under special conditions or with special test equipment or facilities. These design verification tests (see Table 12-9) can even be run on nonflight (breadboard or engineering model) equipment. They demonstrate proper equipment function and allow simplified functional testing at the spacecraft level. For instance, a closed-loop tracking test helps us evaluate performance of an antenna pointing control system. During spacecraft test, the antenna feed can be stimulated by RF signals simulating those encountered during the closed-loop test, thus simplifying the test setup and conduct

TABLE 12-9. Typical Design Verification Tests. These tests demonstrate functionality of components, subsystems, and systems.

• Structural Tests

• Separation Tests

- Static loads test

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