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 我国的地形测量坐标系通常采用高斯-克吕格投影坐标系,由于地球曲率和子午线偏差的影响,POS系统提供的传感器姿态角向影像外方位角元素的转换过程中存在误差,需要引入一个额外的补偿矩阵进行修正。从分析地球曲率和子午线偏差对影像外方位角元素的影响入手,推导补偿矩阵的严密计算公式,并完善了POS角元素的转换公式。通过对带有POS数据的实际航摄影像资料处理,验证补偿矩阵的正确性和实用性。试验结果表明,高斯-克吕格投影坐标系下POS外方位角元素的转换与中央经线的选取密切相关,与坐标原点的选取无关。利用补偿矩阵转换的影像外方位角元素精度明显高于POS系统提供值的精度。 更多还原

【Abstract】 Data obtained via airborne position and orientation system(POS) are in WGS-84,however,the topographic mapping coordinate systems in China are generally Gauss-Kruger projection coordinate system.Owing to the effects of earth curvature and meridian deviation,there are some errors in the process of angle transformation from roll,pitch and heading(Φ,Θ,Ψ) obtained directly by a POS to the attitude angles of images(φ,ω,κ) needed in photogrammetry.Based on the fundamental formula of earth curvature and... 更多还原