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基于点源光度信息推断翻滚碎片的旋转速率,其核心在于获得碎片光变曲线的周期性信息。介绍了交叉残差法,用于分析碎片光变曲线推断转速,并对该方法的适应性问题进行了实验与分析。首先,对交叉残差法进行了理论分析,并与其他方法进行了比较;然后,在实验室测量了典型GEO碎片高保真模型4种翻滚姿态下的光变曲线,并分析了交叉残差;最后,提出了“交叉残差倒数峰值显著率”的概念用于分析碎片光变交叉残差,分光谱计算了各波长光变交叉残差的峰值显著率,确定了最佳探测波段。实验数据显示翻滚周期推断准确、最佳探测波段为380~490 nm。研究结果为空间碎片天基、地基监测系统设计提供依据。
Based on the point source photometric information to infer the rotation rate of tumbling debris, the core of which is to obtain the periodic information of the debris light curve. The method of crossed residuals is introduced to analyze the inferred rotational speed of light curve of debris, and the experiment of adaptability of the method is analyzed. Firstly, the cross-residual method is theoretically analyzed and compared with other methods. Then, the light curves of four typical GEO Fragment high-fidelity models are measured in laboratory and the cross residuals are analyzed. Finally, the concept of “peak saliency of reciprocal residuals of crossed residuals” was proposed to analyze the cross-residuals of optical variability. The peak saliency of the crossed residuals of light wavelengths was calculated by spectroscopy and the best detection band was determined. Experimental data show that the rolling cycle inference is accurate, the best detection wavelength of 380 ~ 490 nm. The results provide the basis for the design of space debris space and foundation monitoring system.