A multi-user satellite system provides communication services to external satellites. This satellite system provides in-orbit access points that can be used by the external satellites to offload data instead on relying directly on ground stations. One approach to such communication is to use a set of interface satellites (“converter satellites”) that provide a gateway between a constellation of satellites that together provide communication services to one or more ground stations, but that do not necessarily have the communication capabilities to communicate with external satellites. In this way, the interface satellites can be put in compatible orbits with external satellites and provide communication gateways that can be used to offload data from the external satellites to ground stations. As external satellites change their communication methods, the interface satellites can be reconfigured or new compatible interface satellites can be launched, without having to modify the constellation of satellites.

A satellite constellation forming system (600) forms a satellite constellation having a plurality of orbital planes in each of which a plurality of satellites fly at the same average orbital altitude. A satellite constellation forming unit (11) forms a passage region for a space object to pass through before the space object passes through an orbital altitude of the satellite constellation from above the satellite constellation. After the space object has passed through the passage region, the satellite constellation forming unit (11) restores the satellite constellation to a state before the passage region is formed.

A satellite constellation forming system (600) forms a satellite constellation which is composed of a satellite group that cooperatively provides a communication service, and has a plurality of orbital planes in each of which a plurality of satellites fly at the same orbital altitude. Each satellite of the satellite group includes inter-satellite communication means and satellite-ground communication means. A satellite constellation forming unit (11) forms the satellite constellation which has ten or more orbital planes with different normal directions, and in which at least one relative angle in an azimuth direction of adjacent orbital planes of the plurality of orbital planes is arranged to be uneven and satellite-ground communication means of satellites flying in orbital planes spaced unevenly have a communication range that achieves complete ground coverage above the equator.

An object is to appropriately manage disclosure of information on the orbit of a satellite constellation. An information management device (1000) is installed in at least one of a plurality of management business devices each of which conducts a management business for a plurality of space objects flying in space. A storage unit (1400) stores orbit forecast information (51) including an orbit forecast, which is a forecast value of an orbit of each of the plurality of space objects, and a forecast error that is forecast for the orbit. An information disclosure unit (1100) determines whether the orbit forecast information (51) is to be disclosed to a different information management device, based on a disclosure threshold (141) for determining whether the orbit forecast information (51) is to be disclosed and the forecast error.

An object is to appropriately manage disclosure of information on the orbit of a satellite constellation. An information management device (1000) is installed in at least one of a plurality of management business devices each of which conducts a management business for a plurality of space objects flying in space. A storage unit (1400) stores orbit forecast information (51) including an orbit forecast, which is a forecast value of an orbit of each of the plurality of space objects, and a forecast error that is forecast for the orbit. An information disclosure unit (1100) determines whether the orbit forecast information (51) is to be disclosed to a different information management device, based on a disclosure threshold (141) for determining whether the orbit forecast information (51) is to be disclosed and the forecast error.

Various embodiments of the disclosed subject matter provide systems, methods, architectures, mechanisms, apparatus, computer implemented method and/or frameworks configured for tracking Earth orbiting objects and adapting SSN tracking operations to improve tracking accuracy while reducing computational complexity and resource consumption associated with such tracking.

Various embodiments of the disclosed subject matter provide systems, methods, architectures, mechanisms, apparatus, computer implemented method and/or frameworks configured for tracking Earth orbiting objects and adapting SSN tracking operations to improve tracking accuracy while reducing computational complexity and resource consumption associated with such tracking.

A method for rapid discovery of satellite behavior, applied to a pursuit-evasion system including at least one satellite and a plurality of space sensing assets. The method includes performing transfer learning and zero-shot learning to obtain a semantic layer using space data information. The space data information includes simulated space data based on a physical model. The method further includes obtaining measured space-activity data of the satellite from the space sensing assets; performing manifold learning on the measured space-activity data to obtain measured state-related parameters of the satellite; modeling the state uncertainty and the uncertainty propagation of the satellite based on the measured state-related parameters; and performing game reasoning based on a Markov game model to predict satellite behavior and management of the plurality of space sensing assets according to the semantic layer and the modeled state uncertainty and uncertainty propagation.

A method for rapid discovery of satellite behavior, applied to a pursuit-evasion system including at least one satellite and a plurality of space sensing assets. The method includes performing transfer learning and zero-shot learning to obtain a semantic layer using space data information. The space data information includes simulated space data based on a physical model. The method further includes obtaining measured space-activity data of the satellite from the space sensing assets; performing manifold learning on the measured space-activity data to obtain measured state-related parameters of the satellite; modeling the state uncertainty and the uncertainty propagation of the satellite based on the measured state-related parameters; and performing game reasoning based on a Markov game model to predict satellite behavior and management of the plurality of space sensing assets according to the semantic layer and the modeled state uncertainty and uncertainty propagation.

A satellite constellation (100) includes a plurality of artificial satellites (111 to 116) that number a multiple of 6. Each of the plurality of artificial satellites orbits in an inclined circular orbit a plurality of times a day. Normals to a plurality of orbital planes corresponding to the plurality of artificial satellites are shifted by an equal angle from each other in an azimuth direction. The plurality of orbital planes make up one or more orbital plane sets each consisting of six orbital planes. Timings at which the six artificial satellites orbit on the six orbital planes of each orbital plane set are synchronized with each other.