CAJ | 학술논문

多视场空间相机包含多个独立的光学成像系统 ,为保证在轨连续成像时各视场成像条带满足重叠要求 ,需要精确的计算相机视场边缘对应的地面轨迹.首先根据空间相机为中心投影成像的特点 ,以坐标系变换结合共线方程推导像点与地面轨迹点的严格数学关系 ,接着以某单星双视场相机为例计算在不同纬度和姿态下的成像条带 ,以条带重叠作为约束 ,遍历计算安装方位角为 -0 .28°时 ,可以保证卫星± 40°侧摆范围内成像时 ,两个视场的条带图像满足重叠要求.该方法同样可应用于其他类型空间相机在任何姿态下的地面轨迹计算.
다시장공간상궤포함다개독립적광학성상계통 ,위보증재궤련속성상시각시장성상조대만족중첩요구 ,수요정학적계산상궤시장변연대응적지면궤적.수선근거공간상궤위중심투영성상적특점 ,이좌표계변환결합공선방정추도상점여지면궤적점적엄격수학관계 ,접착이모단성쌍시장상궤위례계산재불동위도화자태하적성상조대 ,이조대중첩작위약속 ,편력계산안장방위각위 -0 .28°시 ,가이보증위성± 40°측파범위내성상시 ,량개시장적조대도상만족중첩요구.해방법동양가응용우기타류형공간상궤재임하자태하적지면궤적계산.
M ulti-fields space camera contains multiple independent system of optical imaging .In order to ensure overlap-ping of each imaging bands w hile space camera imaging continuously on the orbit ,the ground-track of field edge for cam-era need to be calculated accurately .Firstly ,according to the characteristic that space camera imaging is perspective pro-jection imaging ,the strict mathematical relationship between image point and ground-track point was deduction by com-bining space coordinate transformation with collinearity equation of centre projection .Then ,illustrating by the case of double fields camera ,the imaging bands behind different latitudes and attitudes were calculated .Finally ,the fixing azi-muth angle was calculated by restriction of bands overlapping .The optimal value is -0 .28° .These two imaging bands of fields satisfied the requirement of overlapping ,w hile satellite scrolling imaging betw een +40°and -40° .T he method can be applied to other space camera of different types ,and the ground-track can be calculated at any attitudes .