Satellite communication link analysis method under on-orbit complex environment

Abstract

The invention discloses a satellite communication link analysis method under an on-orbit complex environment. By comprehensively considering a satellite attitude and orbit, a structure layout configuration and component rotating mechanism, load antenna shielding, data transmission antenna shielding, EMC design, satellite-earth communication link parameter, measurement-control antenna design and model selection, a precise satellite model is constructed, and a method for analyzing a satellite communication link under the on-orbit complex environment is designed; the quantified and refined measurement-control segmental arc coverage feature is obtained by simulating through the above-mentioned method by using the actually measured measurement-control antenna directional pattern information under the astral environment, the satellite configuration layout, the measurement-control data transmission system performance improvement, the user on-orbit working mode and the use strategy design canbe optimized, the measurement-control segmental arc is maximally utilized to perform the unlink emergency control or the downlink telemetering monitoring, and the method is especially important for the security of the whole satellite.

Description

technical field [0001] The invention relates to a satellite communication link analysis method in complex orbital environments. The present invention relates to an analysis method for measurement and control data transmission communication links of ground-transmission remote sensing satellites in orbital complex conditions, and is especially suitable for side flight at large swing angles. Remote sensing satellites that are in normal working condition and have complex ground physical and radio frequency environments belong to the field of on-orbit satellite communication. Background technique [0002] The ground transmission remote sensing satellite is composed of a platform system, a remote sensor, and data transmission and sending equipment. The ability to obtain remote sensing information is mainly determined by the performance of the remote sensor and orbital parameters, and is also limited by the power supply, thermal design, and data transmission capabilities of the sate...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the deficiencies of existing technologies, and based on the overall design theory of satellites, a method for analyzing the coverage capability of satellite measurement and control and data transmission links under complex conditions is proposed. The new comprehensive simulation analysis software, (1) establish an accurate simulation system model through the simulation software, comprehensively considering the influence factors of the satellite structure layout and EMC design, the satellite simulation system model includes SAR antenna, 2 sets of data transmission antenna, GPS Antenna; (2) Establish an accurate simulation system model through simulation software, comprehensively consider the orbit design, and the satellite's large-angle side swing operation, and accurately analyze the coverage of the measurement and control antenna using the waist area to communicate with the ground in the large-angle side swing operation mode The arc section can evaluate the seriousness of the deterioration of the antenna gain pattern. (3) Establish an accurate simulation system model through simulation software, which can accurately simulate the coverage information of the measurement and control arc section under the premise of any system margin. , the time accuracy can be covered within 1 second, the arc section of measurement and control can be utilized to the greatest extent, and the miniaturized high-mobility high-gain spot beam data transmission antenna can be guaranteed to accurately track the ground station and transmit payload data. (4) Through simulation The software establishes an accurate simulation system model, and uses the TT&C antenna pattern gain information, polarization information, and rain attenuation information measured by RM satellites to more accurately simulate the real on-orbit link conditions, so as to obtain satellites in orbit. Quantitative and refined coverage characteristics of measurement and control digital transmission arcs

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