At 15:10 on May 6, with the command of "fire" from the Command and Control Center of the Jiuquan Satellite Launch Center, the Tianhui 1-02 satellite was launched by a LM-2D rocket into space. 680 seconds aft...At 15:10 on May 6, with the command of "fire" from the Command and Control Center of the Jiuquan Satellite Launch Center, the Tianhui 1-02 satellite was launched by a LM-2D rocket into space. 680 seconds after the take-off, the satellite separated from the rocket and entered its planned orbit.展开更多
基于高分辨率图像对比法,利用同一卫星平台上空间分辨率19.5m的CCD相机图像对CBERS-02B卫星上空间分辨率为258m的WFI成像仪图像进行在轨MTF(modulate transfer function)测量,获得WFI(wide field imager)相机沿轨、跨轨与45o方向的MTF曲...基于高分辨率图像对比法,利用同一卫星平台上空间分辨率19.5m的CCD相机图像对CBERS-02B卫星上空间分辨率为258m的WFI成像仪图像进行在轨MTF(modulate transfer function)测量,获得WFI(wide field imager)相机沿轨、跨轨与45o方向的MTF曲线,并计算出3个方向的线扩展函数LSF(line spread function),获得3个方向的有效半带宽。结果表明WFI相机红波段跨轨、沿轨与45o方向的有效半带宽,即有效瞬时视场,分别为1.188,1.165与1.281个像元,近红外波段为1.258,1.195与1.326个像元。基于获得的MTF,利用维纳滤波法对WFI图像进行补偿,部分恢复了WFI图像的细部信息。展开更多
文摘At 15:10 on May 6, with the command of "fire" from the Command and Control Center of the Jiuquan Satellite Launch Center, the Tianhui 1-02 satellite was launched by a LM-2D rocket into space. 680 seconds after the take-off, the satellite separated from the rocket and entered its planned orbit.
文摘基于高分辨率图像对比法,利用同一卫星平台上空间分辨率19.5m的CCD相机图像对CBERS-02B卫星上空间分辨率为258m的WFI成像仪图像进行在轨MTF(modulate transfer function)测量,获得WFI(wide field imager)相机沿轨、跨轨与45o方向的MTF曲线,并计算出3个方向的线扩展函数LSF(line spread function),获得3个方向的有效半带宽。结果表明WFI相机红波段跨轨、沿轨与45o方向的有效半带宽,即有效瞬时视场,分别为1.188,1.165与1.281个像元,近红外波段为1.258,1.195与1.326个像元。基于获得的MTF,利用维纳滤波法对WFI图像进行补偿,部分恢复了WFI图像的细部信息。