论文部分内容阅读
地球同步轨道上的三轴稳定卫星所处的空间环境复杂,仪器背景辐射变化较大.传统杂散光分析法无法模拟非均匀温度场,且无法实时计算仪器背景,仿真误差较大.提出用热辐射杂散光集成法来分析在轨红外相机的仪器背景辐射,通过更趋于在轨真实温度的且具有温度梯度的实时温度场,结合辐射传递因子,计算探测器上的仪器背景辐射以及相机的信杂比.将热辐射杂散光集成法、传统杂光分析法计算信杂比与在轨实测信杂比进行对比,热辐射杂散光集成法误差小于17％,而传统杂光分析法误差达114％.表明热辐射杂散光集成法的仿真结果更趋近于在轨实际情况,仿真效率和仿真精度更高.“,”The space environment of the three-axis stabilized satellite in geosynchronous orbit is complex,and the background radiation of the instrument varies greatly.The traditional stray light analysis method can not simulate the non-uniform temperature field,and can not calculate the instrument background in real time.Also the simulation error is large.Thermal radiation stray light integration method was used to analyze instrument background radiation of in-orbit infrared camera.The background radiation of the instrument and the signal-to-clutter ratio of the camera on the detector was calculated by using the real-time temperature fields with temperature gradient and radiation transfer factor.Comparing the result of the thermal radiation stray light integration method and traditional stray light analysis method with the on-orbit measurement,the error of the thermal radiation stray light integration method was less than 17％,while the error of traditional stray light analysis method was up to 114％.The result shows that the thermal radiation stray light integration method is closer to the actual on-orbit situation,and the simulation efficiency and accuracy are higher.