Laser satellite communications
Laser satellite communications
Flocks, herds and schools: A distributed behavioral model
SIGGRAPH '87 Proceedings of the 14th annual conference on Computer graphics and interactive techniques
An epidemic model for information diffusion in MANETs
MSWiM '02 Proceedings of the 5th ACM international workshop on Modeling analysis and simulation of wireless and mobile systems
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IEEE/ACM Transactions on Networking (TON)
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IEEE/ACM Transactions on Networking (TON)
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IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
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Micro-navigation sensors provide position and orientation information for the network of satellites. Each micro-navigation sensor system consists of a global positioning system receiver, a solid-state inertial measurement unit and lasers. To maintain the orientation accuracy of the satellites in the network, an orientation information transfer (OIT) method was developed. Two laser links are established to align a satellite with low orientation accuracy from a satellite with high orientation accuracy. The OIT process is similar to the spread of an epidemic, which has been extensively studied in the epidemiology. Therefore, the information transfer process was analysed by applying a modified epidemic model. The relation between OIT process and the orientation accuracy of the satellites in the network was mathematically investigated. It is shown that the OIT using lasers greatly improves the orientation accuracy of all satellites in the network. Furthermore, the overall orientation accuracy of the satellite network can be improved by increasing the alignment rate or decreasing the decay rate, which are the parameters of the system. The simulation results verified the analysis of the system. The results showed the feasibility of using epidemic theory to analyse orientation accuracy of a satellite network. Finally, this OIT model will allow coordination of relative attitudes between satellites.