Generally, this disclosure provides systems and methods for solar communication and defense networks. A system may comprise a sun and a plurality of celestial bodies; a plurality of mutual orbits of the sun and celestial bodies; and a plurality of spacecraft each of which comprises at least a transmitter, a receiver, an antenna, a sensing device that is capable of monitoring and detecting space objects, a system that is able to adjust the orbit, and a system that is able to intercept space objects.

Technology for satellite-based content delivery network (CDN) is described. The satellite-based CDN uses a network architecture to provide global high-speed Internet service from above the sky through various aircrafts such as high-altitude airships, satellites, space stations, and eventually the lunar data centers by taking into consideration of the technology advancements in the RF and optical wireless communications. The satellite-based CDN provides content delivery over data networks, aviation, data storage, and edge caching. The satellite-based CDN supports both the delay-sensitive traffic such as interactive services, voice calls, and video calls that consume medium to low data bandwidth, and the more delay-tolerant but high bandwidth Internet content items such as streaming and background services (e.g. email, FTP). The satellite-based CDN can also support highly time sensitive applications that require near real-time responses such as professional gaming in selected areas covered by the high-altitude airships.

A method, apparatus and system for controlling an attitude of a spacecraft, the spacecraft including an attitude control system operatively associated with a ground-based spacecraft control system. According to an exemplary embodiment, the spacecraft attitude control system uses a B-spline interpolator for commanding the spacecraft and a Kalman filtering process is used to estimate B-spline interpolator coefficients. The methods and systems disclosed herein can be implemented in, for example, executable machine code and/or integrated circuit hardware.

The invention relates to a satellite-supported solar storm early warning system for providing a warning signal upon approach of a solar storm to Earth, comprising a number of satellites in a region between the Earth and the Sun and stationary with respect to the center of the Earth and to the connecting line between the Earth and Sun, which satellites are respectively equipped with at least one sensor for measuring at least one parameter of a particle flow in the surroundings thereof, and all of which satellites are in radio signal connection with a receiver on Earth, directly and/or via a satellite or one of the satellites, and each of which satellites is equipped to transmit a measured value of a sensor of the system and/or a warning signal upon exceeding a threshold value by a measured value of a sensor of the system to the receiver via the radio signal connection.

A method, apparatus and system for controlling an attitude of a spacecraft, the spacecraft including an attitude control system operatively associated with a ground-based spacecraft control system. According to an exemplary embodiment, the spacecraft attitude control system uses a B-spline interpolator for commanding the spacecraft and a Kalman filtering process is used to estimate B-spline interpolator coefficients. The methods and systems disclosed herein can be implemented in, for example, executable machine code and/or integrated circuit hardware.

A system for planning a mission for spacecraft flying in formation includes an input for receiving data representing a sequence of spatial configurations of the number of spacecraft and a retargeting module configured to generate instructions for causing the number of spacecraft to transition between spatial configurations of the sequence of spatial configurations, including determining a trajectory with periods of fuel-free motion and periods of actuated motion according to a fuel limitation constraint for at least one spacecraft of the number of spacecraft.