卫星激光反射器有效反射面积的计算与测试

Calculation and measurement of the effective reflective area of space-born retro-reflectors

本文介绍了反射器有效反射面积的概念及计算方法,并用矢量的方法分析了光线在角反射器内部的轨迹。计算了60o位置角的角反射器的有效反射面积,对内切圆角反射器的相对有效反射面积进行了测试,给出了测试结果。分析了角反射器位置角对有效反射面积的影响,以及星载激光反射器的反射面积与卫星轨道高度的关系。理论计算及实测结果表明,当卫星高度低于14625km时,为保证在卫星的可观测区域内,反射器均有较大的反射面积,应对角反射器镀以高反射膜,使反射器的有效反射面积不受反射器位置角的影响。

The concept and calculation method of the Effective Reflective Area （ERA） of retro-reflector were discussed. Light track inside retro-reflector was analyzed by vector analysis method, and the effective relative area of retro-reflector with circular front face was measured. The results of the measurement were listed, We analyzed the relation between the position angle of retro-reflector and the ERA, and calculated the relative area of space-borne retro-reflector in different satellite orbit. The results show that the retro-reflector should be coated when the satellite orbit is higher than 14625km.