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地球同步轨道上运行着大量的空间目标,基于光度曲线反演空间目标信息为目标的跟踪、识别与监视提供了新的技术途径。利用STK软件,通过坐标变换获取不同轨道参数下太阳、卫星以及观测站的时空关系。根据视星等定义,利用面元法基于Phong模型推导出适用于立方体、棱柱体以及圆柱体空间目标的视星等模型。通过与实测数据对比,验证该视星等模型的仿真误差约为3%,仿真效果远好于仅采用漫反射率表征的视星等模型。基于Matlab软件,仿真研究了不同弧段、不同形状以及不同尺寸卫星光度曲线的变化规律。研究表明,当获取的光度曲线质量较高时采用非线性滤波技术反演,仅能获得特殊点的视星等信息时采用二面法理论反演,为下一步光度曲线反演提供了一定参考。
Geosynchronous orbit running a large number of space targets, based on the luminosity curve inversion of space target information as the goal of tracking, identification and monitoring provides a new way of technology. Using STK software, the space-time relationship of solar, satellite and observing stations under different orbital parameters is obtained through coordinate transformation. According to the definitions of apparent magnitude and the like, the binocular model is derived based on the Phong model by using the surface element method, which is suitable for cubic, prismatic and cylindrical space targets. Compared with the measured data, it is verified that the simulation error of the apparent magnitude model is about 3%, and the simulation result is far better than the apparent apparent magnitude model which only uses the diffuse reflectance. Based on the Matlab software, the variation rules of the luminosity curves of different arcs, different shapes and sizes of satellites were simulated. The results show that when the acquired photometric curve is of high quality, non-linear filtering technique is used to obtain inversion, and the method of two-sided method can only be used to obtain the information of the apparent point of the special point, which provides a reference for the next photometric curve inversion .