Subsystems may pertain-to a spacecraft.Logical formLearned from7 sentences. A spacecraft may pertain-to a military-or-other-action-organization.Logical formLearned from7 sentences. Systems may pertain-to a spacecraft.Logical formLearned from7 sentences. Communications can be between a spacecraft.Logical formLearned from7 sentences. A spacecraft can be in contact.Logical formLearned from7 sentences. Some (spacecraft systems) may function.Logical formLearned from7 sentences. A spacecraft may be used for (tracking purposes).Logical formLearned from7 sentences. Communications can be with spacecraft.Logical formLearned from7 sentences. A pass may pertain-to a spacecraft.Logical formLearned from7 sentences. A spacecraft may operate on power.Logical formLearned from7 sentences. (Science instruments) can be on a spacecraft.Logical formLearned from7 sentences. A spacecraft may undergo a positioning.Logical formLearned from7 sentences. A distance may pertain-to a spacecraft.Logical formLearned from7 sentences. An imager may pertain-to a spacecraft.Logical formLearned from7 sentences. A (space flight) can be by a spacecraft.Logical formLearned from7 sentences.