项目名称: 利用长春人卫站1.2米光电望远镜进行空间碎片光度多色特性研究
项目编号: No.11503056
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 天文学、地球科学
项目作者: 李振伟
作者单位: 中国科学院国家天文台长春人造卫星观测站
项目金额: 20万元
中文摘要: 目前,空间碎片光度多色特性研究是空间碎片研究领域中备受关注的前沿方向之一。本项目依托长春人卫站1.2米大口径光电望远镜,拟拓展其空间碎片观测综合平台的功能,在卡氏焦点系统上建立同时性三通道CCD测光光度计,实现中高轨道空间碎片在三个可见光波段能量信息的同时获取,可以避免传统测量方法(基于滤光片转轮的多色测光)由于非同时性而引入的测量误差。本项目拟采用等光度线拟合方法来获取典型的拖长星像轮廓,使用孔径测光方法计算参考星的径流量和仪器星等,为空间碎片测光数据提供实时性标定参数,有利于进一步提高非测光夜条件下空间碎片光度测量精度和观测效率。此外,本项目拟对采集的空间碎片同时性三通道测光数据进行有效分析,提取其表征颜色特性的特征量,发展并形成一套有效的空间碎片光度多色特性获取方法,为空间碎片的来源分析、分类与识别提供科学依据,具有重要的现实意义和应用价值。
中文关键词: 空间碎片;同时性多色测光;光电望远镜;分类与识别
英文摘要: Research in multicolor characteristics of space debris is currently one of active research topics in the domain of space debris. This research uses 1.2m large-aperture telescope at Changchun Observatory of National Astronomical Observatories, CAS, whose cassegrain focus will be equipped with a 3-channel CCD photometer, which allows simultaneously imaging in three optical wavelengths of space debris in the medium and high Earth orbit, and eliminates measuring errors of non-synchronization in the traditional multicolor photometry performed by observations through all filters sequentially with a filter wheel. This research uses isophotal analysis method to fit the profiles of irregular stellar image, aperture photometry method to calculate runoff and instrument magnitudes of stellar, which provides real-time parameters for photometric data of space debris, and improves the measuring accuracy and observing efficiency of space debris in non-photometric night. Based on photometric data of space debris and deep analysis, this research achieves the methods and techniques of classification and identification of space debris, which has important practical significance and application value.
英文关键词: Space debris;Simultaneous multicolor photometry;Optoelectronic Telescope;Classification and identification