午夜欧美大片免费观看,欧美激情综合五月色丁香,亚洲日本在线视频观看,午夜精品福利在线

An analysis is made of the current actual influence of electromagnetic environment on data receiving at three national meteorological satellite ground stations.The data transmission frequency of China's next generation polar orbit meteorological satellite is given.The necessity of electromagnetic environment measurement and analysis before a ground station is built and while ground station is operating is discussed.Taking the measurement and analysis of the electromagnetic environment of the Beijing meteorological satellite ground station as an example,the measuring principles and the calculation and analysis method are described,including the classification of interference sources,the calculation of allowed maximum interference,measurement system parameters,measuring procedures,and measuring data;and the measuring data is analyzed.Based on the results of the analysis,the interference sources are determined and a solution is presented,including to identify the location of interference sources through radio environment measurement,then coordinating through the administrative agency and meanwhile adopting certain interference-preventing devices on the receiving facility.