适用于立方体卫星的激光测距合作目标

发布时间：2018-07-05 13:41

本文选题：激光测距 + 立方体卫星　；参考：《光学精密工程》2017年07期

【摘要】：为了给立方体卫星星载GPS定轨数据提供检核标准,并满足高精度测定轨道的应用要求,通过在10cm×10cm×10cm的标准立方体卫星的每个表面分布3个通光口径为1.0cm的微小激光反射器,设计了质量约为108g、视场角满足360°、测距精度可达厘米级的激光测距合作目标。根据角锥棱镜的二面角误差、反射面面形误差及入射面面形误差所引起的光束附加相位,分析角锥棱镜在远场的衍射分布特性;接着,根据激光合作目标在卫星上的分布方式,计算激光合作目标的相对有效面积分布;然后,利用激光测距方程估算不同轨道高度的立方体卫星激光反射器回波光子数,并根据卫星质心改正模型估算激光测距精度;最后,以皮卫星激光合作目标测距试验为例,验证了装载在卫星上的1.0cm微小激光反射器能够反射回足够的激光回波信号。结果表明,此种分布方式对于运行在250~1 000km轨道上的立方体卫星能够提供足够的回波信号,激光测距内精度可达厘米级,满足立方体卫星对激光测距合作目标质量轻、分布灵活、测距精度高的要求。
[Abstract]:In order to provide the check standard for the orbit determination data of the cubic satellite, and to meet the application requirements of high precision orbit determination, three micro laser reflectors with 1.0cm aperture are distributed on each surface of the standard cube satellite of 10cm 脳 10cm 脳 10cm. A laser ranging cooperative target with a mass of about 108 g, a field of view angle of 360 掳and a ranging accuracy of centimeter level is designed. According to the dihedral angle error, the reflection surface error and the incident surface error caused by the angle error, the diffraction characteristics of the angle cone prism in the far field are analyzed, and then, according to the distribution mode of the laser cooperation target on the satellite, the diffraction characteristics of the angle cone prism in the far field are analyzed. The relative effective area distribution of laser cooperative target is calculated, then the echo photon number of cubic satellite laser reflector with different orbital heights is estimated by laser ranging equation, and the accuracy of laser ranging is estimated according to the correction model of satellite centroid. For example, the experimental results of laser range measurement for the laser cooperative target show that the 1.0cm micro laser reflector mounted on the satellite can reflect enough laser echo signals. The results show that this distribution method can provide enough echo signal for the cubic satellite operating in 250m 000km orbit, and the precision of laser ranging can reach centimeter level, which satisfies the Cube-satellite 's light mass and flexible distribution to laser ranging cooperative target. The requirement of high ranging accuracy.
【作者单位】：中国地震局地球物理研究所;中国地震局地震研究所中国地震局地震大地测量重点实验室;
【基金】：国家自然科学基金资助项目(No.41274189) 中国地震局地震研究所所长基金资助项目(No.IS201226038,No.IS201506210)
【分类号】：P228.5

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