The research frontiers, hotspots and development trends related to satellites are important data for the study of satellite intelligence. In this paper, the scientific knowledge graph is applied to the field of satellite intelligence analysis. Using the satellite research data published on the network, Citespace is used to draw the cooperative knowledge graph, keyword co-occurrence graph and keyword clustering graph of satellite research. The research results show that the research heat of satellites in various countries is increasing, and the scientific research cooperation among institutions is closer. The research frontiers focus on humanitarian applications, communication secrecy, broadband Ka-band terminal design and anti-satellite warfare and so on.
A mathematical model of space target illumination characteristics is established based on the basic theory of radiation by considering geometry, background, and material characteristics of the space target. Using the model, the spatial distribution of scattering light intensity from the space target is calculated with the modeling and blanking technique of target when being illuminated by the sun. The relations of specular reflection with the position, geometry, materials and other attributes of the space target are analyzed. Furthermore, the effect of specular reflection on space target detecting is discussed. A method of characteristic simulation of space target is presented. The simulation result indicates that polyhedral structure, mirror surface, or solar sail is easy to cause specular reflection. It shows the effect of specular reflection is helpful for space target detection and identification.
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