卫星角反射器的设计

Design of satellite laser retro-reflector

以角反射器远场衍射理论为依据,提出了利用角反射器参数补偿速差的技术方案。即通过改变角反射器参数的大小,使得接收光斑的极值中心刚好回到测站位置,以弥补速差效应的影响。采用角反射器衍射光学理论与采用传统理论所得的卫星角反射器补偿角之间存在差异,这种差异随着轨道高度的不同而发生变化。以德国Champ卫星上角反射器为例,运用角反射器衍射光学理论进行了设计,设计所得的单角误差-3.70″与Champ卫星提供的-3.8″非常相近,而且按两者结果模拟得到的接收强度仅相差0.6%,从而验证了设计方法的正确性和可靠性。

In the light of far-field diffractive characteristics of retro-reflector, a technical scheme that utilizes parameters of retro-reflector to compensate velocity aberration is brought forward. By changing the parameters of retro-reflector, center of maximal received signal intensity exactly return to the position of measurement, so that the influence of velocity aberration can be compensated. Dihedral angle offsets are different between theory in this paper and traditional theory. Meanwhile, the difference is variable at different orbital height. Theoretical design for retro-reflector on Champ satellite is done. Practically designed dihedral angle offset （-3.70＂） very approximates to Champ satellite＇s parameter -3.8＂ with discrepancy of received signal intensity only 0.6% obtained from stimulations of both results. It proves that the design-method is accurate and reliable.