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针对探测冷背景条件下的空间目标的红外低轨系统,分析了红外低轨星座中凝视传感器对空间目标的探测特点,建立了红外凝视传感器的几何观测模型,考虑其探测距离和范围的约束,提出了一种红外凝视传感器对空间区域的覆盖判定方法,并给了一组表征星座凝视传感器对空间区域覆盖性能的指标。基于点覆盖数值仿真方法,得到了典型红外低轨星座凝视传感器的多重覆盖空间高度分层分布、纬度带多重几何覆盖分布以及立体空间区域多重覆盖高度分布等方面的性能特征,可以体现星座对空间立体区域覆盖的差异性。仿真结果表明了覆盖判别方法和空间覆盖性能指标的有效性,结论可为红外低轨星座设计及其空间应用设计提供一定的参考依据。
Aiming at the infrared low-orbit system which detects space targets under the condition of cold background, the detection characteristics of the gaze sensor in the infrared low-orbit constellation are analyzed, and the geometric observation model of the infrared gaze sensor is established. Considering the detection range and range constraint, A method for determining the coverage of the spatial region by infrared gaze sensor is proposed and a set of indexes are given to characterize the coverage performance of the constellation gaze sensor in the spatial region. Based on the numerical simulation of point coverage, the performance characteristics of multi-coverage space height distribution, multi-geometry coverage distribution and multi-coverage height distribution of three-dimensional space are obtained for typical infrared low-lying constellation gaze sensor, Three-dimensional regional coverage of the difference. The simulation results show the effectiveness of the coverage discrimination method and the space coverage performance index. The conclusion can provide some reference for the design of the infrared low-Earth orbit constellation and its space application design.