为验证地面紫外探测系统是否能对臭氧层以上的高空高速再入目标探测成像,分析了高空高速再入目标产生紫外辐射的机理以及进行地面紫外探测的可行性,并在国内某多用途飞船缩比返回舱实验中,利用自研紫外光学成像验证设备开展验证实验,获取了40 km以上高空高速再入目标的地面紫外探测图像,依托地面平台成功获取臭氧层以上高空高速目标紫外图像。实验表明,在稀薄大气条件下,高空高速目标可以产生强烈的紫外辐射,利用地面紫外探测器完全可以实现对高空高速再入目标的探测成像,并且能够从背景中有效分离和提取成像目标。对于进一步开展空间紫外探测的实际应用研究和深化紫外探测理论具有十分重要的参考价值。

To verify whether the ground ultraviolet detection system can be used to detect the high altitude and high speed reentry targets above the ozone layer, mechanism research of UV radiation caused by high altitude high speed reentry target and feasibility of ground UV detection are studied, and in the return test of the shrinked ratio cabin of a multipurpose spacecraft, an equipment of UV optical imaging is used to carry out the verification test, which obtained above 40 km of high altitude and high speed reentry target surface UV detection image, broke the blank record of ground optical detection which had never get UV image of high-altitude above ozone layer of high speed target. The results show that under the condition of thin atmosphere, the high altitude high speed target can produce strong ultraviolet radiation. And it is feasible to use the ground ultraviolet detector to detect the high altitude high speed reentry target. Moreover, the imaging target can be effectively separated and extracted from the background. It has the important reference value for the further development on practical application and further research on the theory of ultraviolet detection.