A spacecraft can be composite.Logical formLearned from2 sentences. An idea may pertain-to a spacecraft.Logical formLearned from2 sentences. A spacecraft can be in mission.Logical formLearned from2 sentences. Properties may pertain-to a spacecraft.Logical formLearned from2 sentences. Some spacecraft may arrive at an orbit.Logical formLearned from2 sentences. Spacecraft may undergo a time-position.Logical formLearned from2 sentences. (Radiation pressure forces) can be inherent in a spacecraft.Logical formLearned from2 sentences. Some forces may act on a spacecraft.Logical formLearned from2 sentences. A duration may pertain-to a (spacecraft life).Logical formLearned from2 sentences. Spacecraft can be in a (halo orbit).Logical formLearned from2 sentences. Spacecraft may be kept.Logical formLearned from2 sentences. Procedures may bring a spacecraft.Logical formLearned from2 sentences. Rendezvous may require a match of velocities of some spacecraft.Logical formLearned from2 sentences. An (inclination change) may be required over a duration of a (spacecraft life).Logical formLearned from2 sentences. An orbital maneuver may move a spacecraft.Logical formLearned from2 sentences.