The disclosed method for a communication satellite may include (1) simultaneously generating a first transmission beam to a first ground station and a second transmission beam to each of a plurality of second ground stations in sequence according to a schedule, (2) simultaneously receiving a third transmission beam from the first ground station and a fourth transmission beam from each of the second ground stations in sequence according to the schedule, (3) forwarding first data received via the third transmission beam to each of the second ground stations via the second transmission beam, and (4) forwarding second data received via the fourth transmission beam from each of the second ground stations to the first ground station via the first transmission beam. Various other methods and systems are also disclosed.

Provided are an information processing device and the like capable of presenting a user-desired observation result to the user rapidly in a case where observation is performed using observation satellites. The information processing device comprises receiving means for receiving a request to acquire observation data based on a result of observing a designated range at a designated time, specifying means for using orbit information for a plurality of observation satellites to specify an observation satellite with which the designated range can be observed on or after the designated time from among the plurality of observation satellites, and acquiring means for acquiring requested observation data, that is, the observation data which is generated by the specified observation satellite and which is based on a result of observing the designated range on or after the designated time.

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.

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.

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.

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.

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.

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.

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).

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).