With the advancement of Internet applications, the global demand for broadband satellite communication services is incessantly escalating. Furthermore, there exists an exponential surge in the requisition for the capacity of satellite communication systems. In response to this evolving demand, the domain of satellite communication technology is progressively evolving toward the realm of high-throughput satellite (HTS) communication systems. The typical technical characteristics of HTS are: (a) the satellite adopts multibeam technology for beam overlapping coverage of the service area, which improves the quality of the wireless link while realizing the spatial dimension segmentation; (b) based on this, the system adopts multiple frequency multiplexing to improve the communication capacity of a single satellite; (c) gateway stations are tightly coupled with user beam clusters to complete two-hop communication, which makes multiple gateway stations share the communication resources of the same satellite, forming a spatial isolation of the gateway stations, and once again realizing the frequency multiplexing of the gateway station links. A key requirement for future multibeam broadband satellite communication systems is the ability to flexibly adjust beam capacity according to changes in business distribution, in order to meet time-varying business requirements. Beam hopping technology provides an efficient solution to achieve the efficient use of frequency resources and power resources. At the same time, the use of beam hopping makes the beam hopping of satellite payload need to match the business signals of ground signal stations, bringing about the need for synchronization of beam hopping between satellite and ground.

A joint research team from the Institute of Geochemistry of the Chinese Academy of Sciences (IGCAS) and Shandong University has for the first time identified crystalline hematite (α-Fe₂O₃) and maghemite (γ-Fe₂O₃) formed by a major impact event in lunar soil samples retrieved by China's Chang'e-6 mission from the South Pole–Aitken (SPA) Basin. 

Satellite-based Earth observation provides a unique and powerful tool in tracking climate adaptation, an international study involving University of Galway researchers has shown.

A team at the University’s Ryan Institute is helping to pioneer new methods of combining data recorded from space with artificial intelligence to measure actions that help communities, ecosystems and infrastructure adjust to current and future climate impacts in the global agrifood sector.

Space manipulators play an important role in the on-orbit services and planetary surface operation whose reliability is a key issue. In the extreme environment of space, space manipulators are susceptible to a variety of unknown disturbances. Since it is difficult for the manipulator to be repaired immediately, once it fails, it will mean that it cannot complete the mission as expected, which may cause serious losses and dangers. How to have a resilient guarantee, i.e., the manipulator’s ability to resiliently recover and continue to complete tasks, in failure or disturbance is the core capability of its future development. The motion planning unit is used as the computing terminal of the manipulator’s joint motion trajectory. Compared with traditional motion planning, learning-based motion planning has gradually become a hot spot in current research. However, no matter what kind of research ideas, the single robotic manipulator is studied as an independent agent, making it unable to provide sufficient flexibility under conditions such as external force disturbance, observation noise, and mechanical failure.

New evidence from the gravitational-wave event GW230814 shows that when two black holes merge, the horizon area of the resulting black hole is very likely greater than the sum of the horizon areas of the two progenitors. An independent analysis by the Purple Mountain Observatory team finds a significance level up to about 4.1σ, supporting the classic black-hole “area law” originally proposed by Stephen Hawking and further reinforcing general relativity in the highly dynamical, strong-field merger regime.

Based on six years data from high energy particle detectors developed by Institute of High Energy Physics, CAS, onboard the China Seismo-Electromagnetic Satellite (CSES), the scientists analyze comprehensively the evolution characteristics of the geomagnetic field and high-energy protons in the South Atlantic Anomaly (SAA) from 2019 to 2024. The results show that both the magnetic field minimum and the proton flux center of the SAA drift northwestward, while the overall area of the SAA exhibits a shrinking trend. In addition, the spatiotemporal evolution of the SAA shows a certain correlation with solar activity.This marks the capability of China's autonomous and controllable high-quality satellite data to conduct precise and comprehensive monitoring of the space environment, significantly enhancing the country's space exploration capabilities.

Our solar system is racing through space faster than current models predict – as shown by a new study from Bielefeld University. The surprising findings challenge fundamental assumptions of cosmology.