Abstract: A database (102) of a rocket launch assistance device records orbit forecast information of a mega-constellation satellite group (301) that is acquired from a space information recorder included in a mega-constellation business device and space object information that is acquired from a rocket launch business device. The orbit forecast information of the mega-constellation satellite group (301) is composed of a prediction value of an orbit of at least one representative satellite (331) out of the mega-constellation satellite group (301) and a prediction value of an orbit of a constituent satellite (332), which is a value relative to the prediction value of the orbit of the representative satellite (331).

Abstract: An orbit analysis unit (431) of a collision avoidance assistance business device analyzes an orbit of a specific space object. When it is foreseen that the specific space object will intrude into an orbital altitude region where a satellite group of a satellite constellation flies, a notification unit (432) of the collision avoidance assistance business device notifies a satellite constellation business operator of an intrusion alert and non-public orbit information of the specific space object via a communication line that is kept secret. A collision analysis unit (411) of a satellite constellation business device analyzes a collision between the specific space object and an individual satellite in the satellite group of the satellite constellation. A countermeasure planning unit (412) of the satellite constellation business device plans a collision avoidance countermeasure when a collision is foreseen.

Abstract: A space traffic management device (100) mounted in a mega-constellation business device (41) specifies one to a plurality of representative satellites from a mega-constellation satellite group flying on orbits having the same nominal orbital altitude, and has quasi-real-time high-accuracy orbital information of the representative satellite and orbital information relative values of constituent satellites other than the representative satellite, relative to the representative satellite. The space traffic management device (100) shares the quasi-real-time high-accuracy orbital information of the representative satellite and the orbital information relative values of the constituent satellites relative to the representative satellite, with the space traffic management devices (100) mounted in a plurality of business devices.

Abstract: A space information recorder (100) includes two or more categories of a category, acquired from a mega-constellation business device, of different constellations formed at nearby altitudes by the same business operator, a category of a satellite group of each constellation that flies at the same nominal altitude and cooperatively realizes the same mission, a category of orbital planes, a category of each orbital plane of the orbital planes, and a category of an individual satellite. The space information recorder (100) includes information on upper and lower limit values of an orbital altitude or on a nominal altitude and an altitude fluctuation width for each category.

Abstract: An SSA business device (47) is a business device (40) with which an SSA business operator manages space object information. The SSA business device (47) includes a space traffic management device (200) that is compatible with space traffic management devices (200) respectively included in business devices (40) that manage space objects. The SSA business device (47) is connected, through the space traffic management device (200), to a space traffic management system (800) in which the space traffic management devices (200) respectively included in the business devices (40) are mutually connected with a communication line.

Abstract: An orbital analysis unit (431) of a collision avoidance assist business device identifies a mega-constellation satellite group formed in an orbital altitude which the mega-constellation satellite group is anticipated to pass during a flight of an unsteady-operation space object. An announcement unit (432) of the collision avoidance assist business device announces a danger alarm and orbital information of the unsteady-operation space object, to a mega-constellation business device which manages the mega-constellation satellite group. A collision analysis unit (411) of a satellite mega-constellation business device analyzes collision of the unsteady-operation space object with an individual satellite constituting the mega-constellation satellite group. A countermeasure formulating unit (412) of the satellite constellation business device formulates a collision avoidance countermeasure when collision is predicted.

Abstract: A satellite constellation forming system (100) forms a satellite constellation which is composed of a satellite group and in which the satellite group cooperatively provides a service. The satellite constellation has a plurality of orbital planes in each of which a plurality of satellites fly at the same nominal orbital altitude. A satellite constellation forming unit (110) continues providing the service while avoiding a collision between satellites by both or one of control of an orbital altitude and control of a passage timing of a satellite group flying in a region where the plurality of orbital planes intersect.

Abstract: 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.

Abstract: 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.

Abstract: A jamming satellite avoidance method changes an orbital altitude for each of orbital planes with different normal vectors in a mega-constellation satellite group composed of 100 or more satellites, so as to avoid a jamming satellite controlled by a ground device that is different from a device that controls the mega-constellation satellite group. The jamming satellite is an artificial satellite that includes a propulsion device and adopts a nominal orbital altitude and a nominal orbital inclination at which the mega-constellation satellite group flies, and maintains an average orbital altitude and an average orbital inclination while operating the propulsion device irregularly, and is controlled by the ground device that is different from the device that controls the mega-constellation satellite group.

Abstract: An object is to prevent satellites constituting a mega-constellation from remaining in outer space in large numbers after completing their missions. An artificial satellite includes a propulsion device. The artificial satellite has propellant to be used by the propulsion device, and the propellant is in an amount required for the artificial satellite to operate in orbit for a first period of L1 years, which is a satellite design life, and then enter the atmosphere within a period less than the first period of years after deorbit. A ground facility controls the artificial satellite so that the artificial satellite has the amount of propellant required to operate in orbit for the first period of L1 years, which is the satellite design life, and then enter the atmosphere within a period of less than the first period of L1 years after deorbit.

Abstract: 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.

Abstract: To achieve an objective to enable a plurality of management business operators managing space objects flying in space, to share and carry out danger analysis efficiently. In a space traffic management system (500), a plurality of space traffic management devices (100) are connected to each other via a communication line. Each of the plurality of space traffic management devices includes a space information recorder (101), a danger alarm device (102), a danger analysis device (103), a danger avoidance action assist device (104), and a security device (105). The space information recorder includes a space object ID, orbital information, and public condition information; and a business device ID and public condition information. The plurality of space traffic management devices (100) have data format compatibility and share the space object ID and the business device ID, and share orbital information corresponding to the space object ID among business devices that comply with the public condition information.

Abstract: A space information recorder (100) acquires space object information (500), which is orbit forecast information of a plurality of space objects (60), from a management business device (40) used by a management business operator that manages the plurality of space objects (60), and records the space object information (500). The space object information (500) includes a forecast epoch, a forecast orbital element, and a forecast error of each of the plurality of space objects (60). When it is foreseen that a space object A included in the plurality of space objects (60) will intrude into a range at orbital altitudes of 300 km to 1000 km in which a satellite group of LST 10:00 to 11:00 is present, a time period from intrusion to exit and orbit forecast information are recorded.

Abstract: Having as its objective to take flight safety measure per satellite group, a space information recorder (101) is mounted in a mega-constellation satellite business device being a business device that manages a satellite constellation of 100 or more satellites, or in a constellation satellite business device being a business device that manages a satellite constellation of 10 or more satellites. The space information recorder (101) is provided with a category of a satellite group ID (112) which identifies a satellite group in which a group of a plurality of satellites having the same nominal orbital altitude cooperate with each other to fulfill a mission. The category of the satellite group ID (112) includes flight safety measure information (115) expressing flight safety measure of the satellite group.

Abstract: An object is to more accurately assist avoidance of a collision between space objects such as satellites or space debris in outer space. A recorder processing unit (110) acquires flight forecast information (401) indicating a flight forecast of each of a plurality of space objects (60) from a management business device (40) used by a management business operator that manages the plurality of space objects (60). Based on the acquired flight forecast information (401), the recorder processing unit (110) sets a forecast epoch of an orbit of each of the plurality of space objects (60), a forecast orbital element that identifies the orbit, and a forecast error that is forecast for the orbit, as orbit forecast information (51). The recorder processing unit (110) stores a space information recorder (50) including the orbit forecast information (51) in a storage unit (140).

Abstract: An object is to assist an appropriate avoidance action when a collision between space objects in outer space is foreseen in advance. A storage unit (140) stores orbit forecast information (51), which is a forecast value of an orbit of each of a plurality of space objects. An alert control unit (120) determines whether space objects whose locations at the same time are in a dangerous relationship exist as danger-anticipated objects among the plurality of space objects, based on the orbit forecast information (51). When it is determined that the danger-anticipated objects exist, the alert control unit (120) outputs a danger alert indicating existence of the danger-anticipated objects. When the danger alert is output, an avoidance decision unit (150) decides an avoidance space object, which is a space object to perform an avoidance operation, out of space objects included in the danger-anticipated objects.

Abstract: 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.

Abstract: An object is to notify an appropriate intrusion alert by determining whether debris will intrude into an orbit area of a satellite constellation. A passage determination unit (110) determines whether debris will pass through a satellite orbit area, based on satellite orbit forecast information in which a forecast value of an orbit of a satellite is set and debris orbit forecast information in which a forecast value of an orbit of debris is set. When it is determined that debris will pass through the satellite orbit area, an alert generation unit (120) generates an intrusion alert (111) including a predicted time, predicted location coordinates, and predicted velocity vector information that relate to passage of the debris. An alert notification unit (130) notifies the intrusion alert (111) to a management business device (40) used by a management business operator that manages a satellite that flies in the satellite orbit area.

Abstract: A satellite constellation forming system forms a satellite constellation (20) having N orbital planes (21) (N being a natural number) with mutually different normal directions. A satellite constellation forming unit forms the satellite constellation (20) in which each orbital plane (21) of the N orbital planes is an elliptical orbit with the same eccentricity and the same major axis. In the satellite constellation (20), an elevation angle of a major axis of each orbital plane (21) of the N orbital planes has a relative angle of 360/N degrees with respect to each other. In the satellite constellation (20), an azimuth direction of each orbital plane (21) of the N orbital planes has a relative angle of 180/N degrees with respect to each other.