The geological data are constructed in vector format in geographical information system (GIS) while other data such as remote sensing images, geographical data and geochemical data are saved in raster ones. This paper...The geological data are constructed in vector format in geographical information system (GIS) while other data such as remote sensing images, geographical data and geochemical data are saved in raster ones. This paper converts the vector data into 8 bit images according to their importance to mineralization each by programming. We can communicate the geological meaning with the raster images by this method. The paper also fuses geographical data and geochemical data with the programmed strata data. The result shows that image fusion can express different intensities effectively and visualize the structure characters in 2 dimensions. Furthermore, it also can produce optimized information from multi-source data and express them more directly.展开更多
Snow depth （SD） is a key parameter for research into global climate changes and land surface processes. A method was developed to obtain daily SD images at a higher 4 km spatial resolution and higher precision with ...Snow depth （SD） is a key parameter for research into global climate changes and land surface processes. A method was developed to obtain daily SD images at a higher 4 km spatial resolution and higher precision with SD measurements from in situ observations and passive microwave remote sensing of Advanced Microwave Scanning Radiometer-EOS （AMSR-E） and snow cover measurements of the Interactive Multisensor Snow and Ice Mapping System （IMS）. AMSR-E SD at 25 km spatial resolution was retrieved from AMSR-E products of snow density and snow water equivalent and then corrected using the SD from in situ observations and IMS snow cover. Corrected AMSR-E SD images were then resampled to act as ＂virtual＂ in situ observations to combine with the real in situ observations to interpolate at 4 km spatial resolution SD using the Cressman method. Finally, daily SD data generation for several regions of China demonstrated that the method is well suited to the generation of higher spatial resolution SD data in regions with a lower Digital Elevation Model （DEM） but not so well suited to regions at high altitude and with an undulating terrain, such as the Tibetan Plateau. Analysis of the longer time period SD data generation for January between 2003 and 2010 in northern Xinjiang also demonstrated the feasibility of the method.展开更多
被动成像广域空中监视(Wide Area Airborne Surveillance,WAAS)系统因其良好的隐蔽性和动态监视的实时性、持久性及大面积覆盖,已成为情报监视侦察的重要工具,广泛应用于军事、民用领域。文章结合典型被动成像广域空中监视系统(如自动...被动成像广域空中监视(Wide Area Airborne Surveillance,WAAS)系统因其良好的隐蔽性和动态监视的实时性、持久性及大面积覆盖,已成为情报监视侦察的重要工具,广泛应用于军事、民用领域。文章结合典型被动成像广域空中监视系统(如自动实时地面全部署侦察成像系统ARGUS-IS)的特点,从光电传感器设计、数据传输与信息处理等方面阐述被动成像WAAS的系统特点及关键技术环节;重点分析了大视场高分辨率的实现方式、海量数据传输与存储、数据智能分析等制约被动成像WAAS性能的瓶颈技术,为被动成像WAAS的研制与应用提供了参考。展开更多
文摘The geological data are constructed in vector format in geographical information system (GIS) while other data such as remote sensing images, geographical data and geochemical data are saved in raster ones. This paper converts the vector data into 8 bit images according to their importance to mineralization each by programming. We can communicate the geological meaning with the raster images by this method. The paper also fuses geographical data and geochemical data with the programmed strata data. The result shows that image fusion can express different intensities effectively and visualize the structure characters in 2 dimensions. Furthermore, it also can produce optimized information from multi-source data and express them more directly.
基金Meteorological Research in the Public Interest,No.GYHY201106014Beijing Nova Program,No.2010B037China Special Fund for the National High Technology Research and Development Program of China(863 Program),No.412230
文摘Snow depth （SD） is a key parameter for research into global climate changes and land surface processes. A method was developed to obtain daily SD images at a higher 4 km spatial resolution and higher precision with SD measurements from in situ observations and passive microwave remote sensing of Advanced Microwave Scanning Radiometer-EOS （AMSR-E） and snow cover measurements of the Interactive Multisensor Snow and Ice Mapping System （IMS）. AMSR-E SD at 25 km spatial resolution was retrieved from AMSR-E products of snow density and snow water equivalent and then corrected using the SD from in situ observations and IMS snow cover. Corrected AMSR-E SD images were then resampled to act as ＂virtual＂ in situ observations to combine with the real in situ observations to interpolate at 4 km spatial resolution SD using the Cressman method. Finally, daily SD data generation for several regions of China demonstrated that the method is well suited to the generation of higher spatial resolution SD data in regions with a lower Digital Elevation Model （DEM） but not so well suited to regions at high altitude and with an undulating terrain, such as the Tibetan Plateau. Analysis of the longer time period SD data generation for January between 2003 and 2010 in northern Xinjiang also demonstrated the feasibility of the method.
文摘被动成像广域空中监视(Wide Area Airborne Surveillance,WAAS)系统因其良好的隐蔽性和动态监视的实时性、持久性及大面积覆盖,已成为情报监视侦察的重要工具,广泛应用于军事、民用领域。文章结合典型被动成像广域空中监视系统(如自动实时地面全部署侦察成像系统ARGUS-IS)的特点,从光电传感器设计、数据传输与信息处理等方面阐述被动成像WAAS的系统特点及关键技术环节;重点分析了大视场高分辨率的实现方式、海量数据传输与存储、数据智能分析等制约被动成像WAAS性能的瓶颈技术,为被动成像WAAS的研制与应用提供了参考。
