摘要
Abstract
In order to meet the demand of global ship monitoring,the automatic identification sys-tem (AIS)is equipped on the HY-1C/D satellite realizing for each satellite to monitor and acquire information of global ocean ships twice a day.Since the AIS receiver works in low frequency with a high sensitivity,it is vulnerable to external signals in low frequency,which would deteriorate its performance such as demodulation probability and observation swath.On the other hand,as an optical satellite,HY-1 C/D carries several optical payloads,and it is impossible to wrap the whole satellite with electromagnetic shielding material.Therefore,in order to solve the problem of low frequency interference to AIS,this paper proposes methodologies including important e-quipment electromagnetic shielding,the optimization of AIS antenna pattern and mounting posi-tion design,and electromagnetic compatibility (EMC)implementation on the satellite level.The methodologies are already validated by the ground experiment.After the successful launch of the satellite,the global ship identification information acquired by AIS furthermore proves all the methods mentioned above.Meanwhile,combined with current in-orbit application status,this pa-per brings about advice on the design and application of future spaceborne AIS receiver payloads.关键词
海洋一号C/D卫星/船舶自动识别系统/电磁兼容/低频干扰Key words
HY-1C/D satellite/AIS/EMC/low frequency interference分类
航空航天
