A spacecraft may encounter problems.Logical formLearned from3 sentences. A spacecraft may be tested.Logical formLearned from3 sentences. Subsystems may pertain-to a spacecraft.Logical formLearned from3 sentences. A spacecraft may undergo an occultation.Logical formLearned from3 sentences. A volume may pertain-to a spacecraft.Logical formLearned from3 sentences. Reentry may pertain-to a spacecraft.Logical formLearned from3 sentences. A relative velocity may pertain-to a spacecraft.Logical formLearned from3 sentences. A relative motion can be between a spacecraft.Logical formLearned from3 sentences. Installation can be in a spacecraft.Logical formLearned from3 sentences. Axis may pertain-to a spacecraft.Logical formLearned from3 sentences. A compartment may pertain-to a spacecraft.Logical formLearned from3 sentences. Instruments can be for a spacecraft.Logical formLearned from3 sentences. A spacecraft may pertain-to an engineer/inventor.Logical formLearned from3 sentences. A person may design a spacecraft.Logical formLearned from3 sentences. A government-agency may launch some spacecraft.Logical formLearned from3 sentences.