In-flight observations of electromagnetic interferences emitted by satellite  

作　　者：CAO JinBin YANG JunYing YUAN ShiGan SHEN XuHui LIU YuanMo YAN ChunXiao LI WenZhen CHEN Tao 

机构地区：[1]School of Astronautics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China [2]State Key Laboratory for Space Weather/CSSAR,Beijing 100191,China [3]Dongfanghong Satellite Co.,China Academy of Space Technology,Beijing 100094,China [4]Institute of Earthquake Science,Beijing 100036,China

出　　处：《Science China(Technological Sciences)》2009年第7期2112-2118,共7页中国科学（技术科学英文版）

基　　金：Supported by the National Hi-Tech Research and Development Program of China("863"Project)(Grant No.2008AA12A216);the National Science&Technology Supporting Program during the Eleventh Five-Year Plan,the National Natural Sci-ence Foundation of China(Grant No.40523006);the National Basic Research Pro-gram of China("973"Project)(Grant No.2006CB806305);the Specialized Research Fund for State Key Laboratories

摘　　要：Using the data from STAFF/TC-1, this paper for the first time analyzes the electromagnetic interferences of Chinese scientific satellite. The electromagnetic interference of satellite exists mainly below 30 Hz, but can extend to 190 Hz with an obviously decreasing power spectral density. The electromagnetic interferences at frequencies below 190 Hz have good correlation with the solar aspect angle. The electromagnetic interferences at frequencies between 190 and 830 Hz have also correlation with solar as-pect angle. However, the electromagnetic interferences at frequencies above 830 Hz have no correlation with the solar aspect angle. The correlation coefficient between solar aspect angel and electromagnetic interferences is around 0.90. The larger the solar aspect angle, the stronger the satellite electromagnetic interference. When the solar aspect angle increases from 90.6° to 93.6°, the electromagnetic interferences at frequencies <10 Hz increase by 8 times and those at frequencies 190―830 Hz increase by 60%. This close association of electromagnetic interferences with the solar aspect angle indicates that the solar aspect angle is the main factor to determine the electromagnetic interferences. The electromagnetic interferences of satellite in sunlight are larger than those in eclipse. The electro-magnetic interference produced by solar panel occupies about 87% in the low frequency band (<100 Hz) and 94% in the high frequency band (>100 Hz) of the total electromagnetic interference produced by satellite. These in flight observations of electromagnetic radiation of satellites will be very helpful to the designs of future satellites of space sciences or earthquake sciences.Using the data from STAFF/TC-1, this paper for the first time analyzes the electromagnetic interferences of Chinese scientific satellite. The electromagnetic interference of satellite exists mainly below 30 Hz, but can extend to 190 Hz with an obviously decreasing power spectral density. The electromagnetic interferences at frequencies below 190 Hz have good correlation with the solar aspect angle. The electromagnetic interferences at frequencies between 190 and 830 Hz have also correlation with solar aspect angle. However, the electromagnetic interferences at frequencies above 830 Hz have no correlation with the solar aspect angle. The correlation coefficient between solar aspect angel and electromagnetic interferences is around 0.90. The larger the solar aspect angle, the stronger the satellite electromagnetic interference. When the solar aspect angle increases from 90.6° to 93.6°, the electromagnetic interferences at frequencies <10 Hz increase by 8 times and those at frequencies 190–830 Hz increase by 60%. This close association of electromagnetic interferences with the solar aspect angle indicates that the solar aspect angle is the main factor to determine the electromagnetic interferences. The electromagnetic interferences of satellite in sunlight are larger than those in eclipse. The electromagnetic interference produced by solar panel occupies about 87% in the low frequency band (<100 Hz) and 94% in the high frequency band (>100 Hz) of the total electromagnetic interference produced by satellite. These in flight observations of electromagnetic radiation of satellites will be very helpful to the designs of future satellites of space sciences or earthquake sciences.

关 键 词：Double STAR Program STAFF electromagnetic interference SATELLITE ATTITUDE solar ASPECT angle 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计]