基于532 nm波长的空间碎片白天激光测距研究与试验

Research and Experiment on Space Debris Daytime Laser Ranging Based on 532 nm Wavelength

为了提高中国科学院云南天文台1.2 m望远镜激光测距平台对空间碎片的监测能力,开展了白天空间碎片激光测距技术与方法研究。首先,分析了利用云南天文台现有的1.2 m望远镜激光测距试验平台开展白天空间碎片激光测距的可行性。然后,对白天空间碎片激光测距关键问题进行了分析并提出解决措施。通过白天空间碎片激光测距试验,获得了一部分空间碎片激光测距数据,所测量空间碎片的雷达散射截面范围为9.0~20.0 m^(2)、近地点范围为400~900 km、远地点范围为500~900 km。结果表明:云南天文台空间碎片激光测距平台具备空间碎片白天激光测距的潜力,可为后续开展全天时空间碎片激光测距研究提供技术支持。

Laser ranging technology is crucial for the monitoring and early warning of space debris.To improve the monitoring capability of the 1.2 m telescope laser ranging platform of the Yunnan Observatory of the Chinese Academy of Sciences for space debris,the daytime laser ranging technology and method for space debris monitoring were studied.First,the feasibility of using the existing 1.2 m telescope laser ranging platform of the Yunnan Observatory to perform daytime space debris laser ranging was analyzed.Then,the key problems associated with space debris laser ranging during daytime were analyzed and solutions were proposed.Based on a daytime space debris laser ranging experiment,some space debris laser ranging data were obtained.The cross section of the measured space debris radar ranges from 9.0 m^(2) to 20.0 m^(2),the perigee ranges from 400 km to 900 km,and the apogee ranges from 500 km to 900 km.Results show that the space debris laser ranging platform of the Yunnan Observatory can perform space debris laser ranging during daytime,which can provide technical support for subsequent research on space debris laser ranging.