围绕"嫦娥4号"月球轨道超长波天文观测微卫星展开研究,针对微纳卫星对地数传资源的限制,提出一种在轨信号预处理方法:通过10通道数字下变频链路实现原始数据的变频接收,再利用多级滤波器抽取获得低采样率基带数据,下变频本振...围绕"嫦娥4号"月球轨道超长波天文观测微卫星展开研究,针对微纳卫星对地数传资源的限制,提出一种在轨信号预处理方法:通过10通道数字下变频链路实现原始数据的变频接收,再利用多级滤波器抽取获得低采样率基带数据,下变频本振频率可调,在对地数传资源约束下保证了不同频带数据的灵活选取。以上方法实现了一种10频点超窄带梳状滤波,仿真验证表明,采样率80 MSPS基带带宽为1 k Hz的情况下,此方法可在现场可编程门阵列平台上稳定运行,能保证带内平坦度和线性相位等关键技术指标,数据量与直接下传原始数据相比,降低了3个数量级以上。展开更多
The Chinese Meridian Project(CMP)is the Space Environment Ground Based Comprehensive Monitoring Network of China,a national major science and technology infrastructure project.The CMP consists of the Space Environment...The Chinese Meridian Project(CMP)is the Space Environment Ground Based Comprehensive Monitoring Network of China,a national major science and technology infrastructure project.The CMP consists of the Space Environment Monitoring System,Data Communication System,and Science Application System.Its construction has been divided into two steps:the PhaseⅠwas from 2008 to 2012;the PhaseⅡstarted at the end of 2019,expected to be completed at the end of 2023.Beyond 2023,the CMP as a whole will be in operation to make observations.This report introduces the construction progress of CMP PhaseⅡin the past two years,covering the construction progress of both the Data Communication System and the Science Application System.As for the Space Environment Monitoring System,this report mainly gives an introduction to the construction progress of large-scale advanced monitoring equipment,such as,the solar radio telescope,interplanetary scintillation telescope,incoherent scatter radar,high frequency radar,MST radar,and large-aperture Helium Lidar.In addition,this paper presents the construction plan for the next two years and the future outlook as well.展开更多
文摘围绕"嫦娥4号"月球轨道超长波天文观测微卫星展开研究,针对微纳卫星对地数传资源的限制,提出一种在轨信号预处理方法:通过10通道数字下变频链路实现原始数据的变频接收,再利用多级滤波器抽取获得低采样率基带数据,下变频本振频率可调,在对地数传资源约束下保证了不同频带数据的灵活选取。以上方法实现了一种10频点超窄带梳状滤波,仿真验证表明,采样率80 MSPS基带带宽为1 k Hz的情况下,此方法可在现场可编程门阵列平台上稳定运行,能保证带内平坦度和线性相位等关键技术指标,数据量与直接下传原始数据相比,降低了3个数量级以上。
文摘The Chinese Meridian Project(CMP)is the Space Environment Ground Based Comprehensive Monitoring Network of China,a national major science and technology infrastructure project.The CMP consists of the Space Environment Monitoring System,Data Communication System,and Science Application System.Its construction has been divided into two steps:the PhaseⅠwas from 2008 to 2012;the PhaseⅡstarted at the end of 2019,expected to be completed at the end of 2023.Beyond 2023,the CMP as a whole will be in operation to make observations.This report introduces the construction progress of CMP PhaseⅡin the past two years,covering the construction progress of both the Data Communication System and the Science Application System.As for the Space Environment Monitoring System,this report mainly gives an introduction to the construction progress of large-scale advanced monitoring equipment,such as,the solar radio telescope,interplanetary scintillation telescope,incoherent scatter radar,high frequency radar,MST radar,and large-aperture Helium Lidar.In addition,this paper presents the construction plan for the next two years and the future outlook as well.
