Key Technology Research On Intersatellite Laser Ranging And Communication System

Laser ranging communication integration technology is a new monitoring and control system based on laser communications and laser measurement technology on the proposed use of a laser as an information carrier,to achieve the spacecraft trajectory measurement and data transmission,relaying,uplink control information between the aircraft and ground stations,downlink telemetry and payload measurement information transmission,inter-satellite distance measurement and time-frequency transmission system integration,monitoring and control and to adapt to the future direction of development of communication technology.Inter-satellite time transfer from home and abroad through research and communication technology and spaceborne laser ranging technology,based on intersatellite laser ranging communication integration technology principle,to carry out inter-satellite acquisition,inter-satellite tracking,the satellite and ground disturbance and Technology verify system.Between research satellite capture and multi-field scanning field scanning capture key technologies,focusing on the key factors in the simulation modeling of the impact of the acquisition time by carding key influence link.Unidirectional and bidirectional satellite tracking study of the impact between the closed-loop system to track the performance of the tracking error,and to focus research for inter-satellite laser communication link technology for two-way closed loop tracking stability by simulation tracking angle variance convergence theoretical analysis.Disturbance of the satellite to study characteristics of the local oscillator,respectively,reaction wheel balancing,static unbalance reaction wheels,dynamic imbalance reaction wheel and Disturbed Harmonic Reaction Wheels Analytic Modeling as a disturbance vibration affect the satellite to provide analysis model.Time-frequency analysis of the error sources for inter-satellite laser ranging link principle,to improve the accuracy of the ranging method based on the time error source research,and gives high-precision distance measurement program.Through theoretical study of the influence of laser communications satellite ranging integration among key technologies,combined with the realization of the project to carry out ground verification system simulation analysis of key technology,combined with the current satellite communications and Ranging technology,focusing on satellite disturbance simulation technology,satellite tracking simulation technology,inter-satellite optical signal transceiver simulation technique and precision intersatellite ranging technology simulation analysis,and gives the key to solving the proposed measures to improve the inter-satellite laser ranging precision for the communication technology.Completed the design and prototype development of inter-satellite laser ranging communication integration of key technologies ground verification system,the existing communications and satellite laser ranging target,given the satellite disturbance simulator,satellite tracking,satellite simulator light signal simulator transceiver and time detector design,system performance test carried out by the experimental results demonstrate the feasibility of laser communication technologies ranging between integration precision stars.