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Determination method of satellite antenna pointing accuracy

A satellite antenna, pointing accuracy technology, applied in the direction of measuring angles, measuring devices, instruments, etc., can solve problems such as increasing the pointing error of satellite antennas, and achieve the effect of simple calculation

Active Publication Date: 2012-06-20
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

The existence of these errors will increase the pointing error of the satellite antenna to a certain extent. Only considering the error of the antenna pointing mechanism cannot truly reflect the actual antenna pointing error when the satellite is in orbit.

Method used

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  • Determination method of satellite antenna pointing accuracy
  • Determination method of satellite antenna pointing accuracy
  • Determination method of satellite antenna pointing accuracy

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Embodiment Construction

[0032] The method of the present invention starts from the point of view of the satellite large system, determines the various error sources that affect the pointing accuracy of the satellite antenna, analyzes the characteristics of each error source, and obtains the pointing accuracy error of the satellite antenna through comprehensive calculation, so as to confirm whether the overall design of the satellite is correct or not. Meet the needs of the whole star mission.

[0033] 1) Determination of error sources, the error sources that affect the pointing accuracy of satellite antennas include the following items.

[0034] Errors caused by the characteristics of the antenna itself, including thermal deformation of the antenna, antenna deployment, and antenna measurement errors;

[0035] Satellite assembly and component installation errors, including the verticality error of the center bearing cylinder, the installation error of the earth sensor, the installation error of the an...

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Abstract

A determination method of satellite antenna pointing accuracy comprises the following steps: firstly, with respect to a satellite large-scale system, determining various error sources that influence the satellite antenna pointing accuracy, wherein the error sources mainly comprise antenna characteristics, installation errors of satellite general assembly and parts, attitude control errors of a satellite system system, and satellite orbit drift; secondly, performing effect characteristic analysis of the determined various error source items, wherein the error source items are divided into constant errors, daily variable errors, short-period errors, and long-term errors; finally, calculating the rolling, pitching, yaw pointing errors of the satellite antenna on a satellite shaft, the pointing errors in the north-south and west-east directions, and the antenna pointing half cone angle errors. The method of the invention comprehensively considers various error sources and their characteristics that influence the satellite antenna pointing accuracy, can accurately provide the satellite antenna pointing accuracy, is simple in calculation, and is applicable to the engineering calculation of earth stationary orbit satellite antenna pointing accuracy.

Description

technical field [0001] The invention relates to a method for determining the pointing accuracy of a satellite antenna, in particular to a method for determining the pointing accuracy of an antenna applied to geostationary orbit satellites. Background technique [0002] The pointing accuracy index of the communication antenna is an important system-level performance index of the communication satellite. It is necessary to consider various influences when designing the system, and comprehensively analyze the pointing accuracy of the satellite antenna to ensure that the satellite mission requirements are met. [0003] The existing technology only analyzes and calculates the antenna pointing accuracy from the working conditions of the antenna pointing mechanism itself; the relevant references are as follows: [0004] [1] Sun Jing, Ma Xingrui, Yu Dengyun. Pointing accuracy analysis of spaceborne antenna dual-axis positioning mechanism [J]. Acta Astronautics Sinica, 2007, 28(3): 5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C1/00
Inventor 吕红剑石明潘屹杨凌轩刘建功侯芬赵旖旎周明玮
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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