Sub-systems may pertain-to a spacecraft.Logical formLearned from4 sentences. Passes may pertain-to a spacecraft.Logical formLearned from4 sentences. A (flight computer) may pertain-to a spacecraft.Logical formLearned from4 sentences. A state may pertain-to a spacecraft.Logical formLearned from4 sentences. A spacecraft may visit a planet.Logical formLearned from4 sentences. (Spacecraft images) may pertain-to a planet.Logical formLearned from4 sentences. Persons may ensure a (spacecraft health).Logical formLearned from4 sentences. Persons may place (spacecraft maneuvers).Logical formLearned from4 sentences. A (spacecraft team) may investigate a (root cause) of a failure.Logical formLearned from4 sentences. A downlink can be from a spacecraft.Logical formLearned from4 sentences. An accelerometer may pertain-to a spacecraft.Logical formLearned from4 sentences. A firing of a (rocket engine) may place a spacecraft.Logical formLearned from4 sentences. A spacecraft may finish.Logical formLearned from4 sentences. A spacecraft may conduct a rocket.Logical formLearned from4 sentences. A series of (trial observations) may complete (spacecraft checkouts).Logical formLearned from4 sentences.