CAJ | 학술논문

白天空间目标激光测距数据有助于提高空间目标定轨精度，在航天科研方面具有重要应用价值。白天天空背景较亮，激光测距回波信号一般很弱，从较强背景光中识别出微弱的空间目标激光回波信号十分困难。针对白天空间目标激光测距微弱信号探测技术难题，从白天天空背景噪声影响估算入手，计算了不同探测阈值情况下的测距虚警率，分析了白天激光测距距离门宽与探测阈值的关系，给出了白天对空间目标激光测距的回波信号探测阈值，提出了基于多光子探测器的白天激光测距微弱信号探测方法，并对其可行性进行了实验验证，该研究成果可应用于白天空间目标激光测距系统设计及新型激光测距系统发展研究等方面。
백천공간목표격광측거수거유조우제고공간목표정궤정도，재항천과연방면구유중요응용개치。백천천공배경교량，격광측거회파신호일반흔약，종교강배경광중식별출미약적공간목표격광회파신호십분곤난。침대백천공간목표격광측거미약신호탐측기술난제，종백천천공배경조성영향고산입수，계산료불동탐측역치정황하적측거허경솔，분석료백천격광측거거리문관여탐측역치적관계，급출료백천대공간목표격광측거적회파신호탐측역치，제출료기우다광자탐측기적백천격광측거미약신호탐측방법，병대기가행성진행료실험험증，해연구성과가응용우백천공간목표격광측거계통설계급신형격광측거계통발전연구등방면。
Daytime space target laser ranging data can help improve the space target orbit determination precision, has important application value in terms of space research. During the daytime, the sky background is light, laser ranging echo signal is very weak, generally to identify the weak space target laser echo signal from the strong background light is very difficult. In allusion to weak signal detecting technical problem of laser ranging for space target in the daytime, influence of sky background noise in the daytime was estimated, ranging false alarm probabilities at various detection threshold was calculated, relation of detection threshold and laser ranging gate was analyzed, detection threshold requirement of laser ranging for space target in the daytime was presented, a weak signal detecting method of laser ranging for space target in the daytime based on multi-photon detector was put forward, and its feasibility was validated by experiment. This result can be used for designing daytime laser ranging system and researching new type laser ranging system.