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讨论了大气湍流对空 地和地 空光学系统图像分辨力的影响。大气相关长度r0是评定大气湍流是否影响光学系统图像分辨力的主要依据。采用不同的大气湍流模型,通过计算相关长度得到了大气湍流对系统图像分辨力的影响,并对空 地与地 空系统的大气相关长度进行了计算比较。结果表明:对空 地观测系统来说,大气相关长度是大气层高度和反映大气湍流特征的C2n的函数。而对地 空观测系统来说,大气相关长度与高度几乎无关。分析了大气湍流对机载和星载光学遥感系统成像分辨力的影响。
The effect of atmospheric turbulence on the image resolution of open ground and terrestrial optical systems is discussed. Atmospheric correlation length r0 is the main basis for assessing whether atmospheric turbulence affects the resolution of an optical system image. By using different atmospheric turbulence models, the effects of atmospheric turbulence on the resolution of the system image are obtained by calculating the correlation length, and the atmospheric correlations between the ground and air-ground systems are calculated and compared. The results show that for the open space observing system, the atmospheric correlation length is a function of atmospheric height and C2n, which reflects the characteristics of atmospheric turbulence. For surface-to-air observation systems, the correlation between atmospheric length and height has little to do with it. The influence of atmospheric turbulence on the resolution of airborne and spaceborne optical remote sensing systems is analyzed.