SMAP射频干扰与夜间灯光分布关系初探

Preliminary Study on relationship Between Radio Frequency Interference of SMAP and Night Light Distribution

文章对SMAP射频干扰和灯光分布的关系进行了初步探索。为检测和衡量人类活动对SMAP射频干扰(SMAP-RFI)造成的影响,以夜间灯光数据作为衡量人类活动强度的标准,探究RFI的强度和分布规律。结果显示:RFI源往往会伴随着夜间高灯光区出现,夜间灯光数据与RFI强度负相关系数达0.55;在个别低灯光区也观测到很强的RFI,RFI源具有辐射特性,多个RFI源在低灯光区辐射叠加产生了很强的RFI;夜间灯光数据能够识别催生RFI源因素的分布,但无法量化这些因素,不能准确识别工厂、机场、基站等,这会对RFI和夜间灯光值的关系造成影响。

The relationship between SMAP radio frequency interference and light distribution is preliminarily explored.In order to detect and measure the impact of human activities on SMAP radio frequency interference(SMAP-RFI),the intensity and distribution of RFI are studied by using night light data as the standard to measure the intensity of human activities.The results show that RFI sources often appear in high light areas at night,and the negative correlation coefficient between night light data and RFI intensity is 0.55.Strong RFI is also observed in some low-light areas.RFI sources have radiation characteristics,and the radiation superposition of multiple RFI sources in low-light areas produces strong RFI.Night lighting data can identify the distribution of the factors that causes RFI,but it cannot quantify these factors and accurately identify factories,airports,base stations,etc.,which can affect the relationship between RFI and night lighting values.