In view of the current situation that ground-based telescopes in the field of deep space detection have difficulty in directly ranging of the object, research on efficient ranging using the sun as an external radiation source was carried out. The idea of using the sun as an external radiation source for the direct ranging of deep-space object was firstly proposed. The ranging scheme based on the intensity fluctuation of the sunlight between the direct wave and the reflected wave by the object was established. Next, the feasibility and engineering difficulties of this scheme were also simulated and analyzed. Finally, the simulated solar radiation source was successfully used to achieve object ranging in the laboratory environment. The demonstration and implementation of this scheme is expected to provide high precision ranging capability for existing optical survey telescopes, and provide a new idea for establishing an efficient deep space detection system.
YU Yi-chen, LI Jiang-yuan, GUO Jing-jing, GE Peng.
Deep-space Object Direct Ranging with Sunlight as External Radiation Source[J].
Science Technology and Engineering, 2026, 26(2): 673-679 DOI:10.12404/j.issn.1671-1815.2501960
在涨落关联测距模型中,深空目标除了会反射太阳光以外还会受太阳光照射加热而自发辐射光子,该光子会作为干扰信号难以被滤除也有概率被望远镜接收。根据图1中的三角关系,按照Myhrvold[16]提出的计算深空目标的简化热物理模型(near-earth asteroid thermal model,NEATM),计算接收望远镜孔径处的热光子数为
YangXu, ZhaoKexin, GanQingbo, et al. Analysis of early warning capability of space-ground optical monitoring system for near-earthasteroids[J]. Transactions of Beijing Institute of Technology, 2021, 41(12): 1307-1313.
LiHaitao, LiuJianjun, ChenShaowu, et al. Discussion on the needs and technical approaches of constructing a radar system for near-earth asteroid detection in China[J]. Science China: Information Science, 2021, 51(2): 325-346.
SunZhonghai, WangXiaoqian, GaoChao, et al. Research on ranging technique based on temporal correlation[J]. Journal of Changchun University of Science and Technology(Natural Science Edition), 2025, 48(1): 47-55.
[14]
LiuX F, ChenX H, YaoX R, et al. Lensless ghost imaging with sunlight[J]. Optics Letters, 2014, 39(8): 2314-2317.
LiJiangyuan, YuYichen. Research of passive ranging by external source based on the intensity fluctuation correlation of light field[J]. Radar Science and Technology, 2025, 23(1): 75-81.
ChenYihai, ZhangYing, WeiYu, et al. Theoretical and experimental study of the effects of coherent time of pseudo thermal light on ghostimaging[J]. Chinese Journal of Radio Science, 2020, 35(3): 386-394.
WeiZhen, LuRonghua, YuHong, et al. Research on intensity-correlated Interferometry with ultra-weak light based on coincidence counting[J]. Acta Optica Sinica, 2020, 40(1): 211-218.
[25]
ChenH, LiuJ, LiF, et al. Measuring hanbury brown and twiss effect of multi-spatial-mode thermal light at ultrashort timescale by two-photon absorption[J]. IEEE Photonics Journal, 2018, 18.DOI: 10.1109/JPHOT.2018.2879973.
[26]
NathanM. Comparing NEO search telescopes[J]. Publications of the Astronomical Society of the Pacific, 2016, 128(962). DOI10.1088/1538-3873/128/962/045004.
YinLuyuan, HuangXiaoming. Proximal gradient descent method for compressive ghost imaging based on ℓq-regularization[J]. Science Technology and Engineering, 2023, 23(12): 5110-5117.