地月平动点高轨观测系统设计及效能分析

doi:10.12305/j.issn.1001-506X.2025.02.19

Abstract

Abstract:

According to the requirements of real-time observation and abnormal motion perception of high-orbit targets, a tribe-satellite constellation system at the earth-moon libration points (L3/L4/L5 point) is designed and the working mode design of double-edge and double-field of view for real-time observation of geostationary earth orbit (GEO) targets is completed. Based on the real-time requirements from high-orbit target observation system, the result of theoretical analysis showes the demand field of view of camera equipped on satellite is 4°×10.5°, the detection sensitivity is 21Mv, the exclusion angle earth-atmosphere radiation demand is 3.5° and the solar suppression angle demand is 50°. Through the efficiency simulation calculation, the proposed tribe-satellites system can stagger the backlight non-working time of different cameras equipped on satellites and achieve 100% GEO area coverage rate in 10 years, which verifies the reliability of the theoretical analysis for the demand of camera. At the same time, it can be found from the simulation results of target coverage rate that the double coverage rate of typical targets in 24 hours in four typical solar terms can reach 41.3%~98.3%, which can effectively improve the accuracy of cataloguing, orbit determination and target detection probability, and reduce the false alarm rate of abnormal motion perception.

Key words: earth-moon libration point, high-orbit target, constellation design, demand of camera, efficiency analysis

CLC Number:

V412.4

Jingpeng ZHANG, Qihang CHEN, Ming XIA, Lei DONG, Zhenzhen ZHENG, Jiumei YAN, Congyun JI, Yanhui WANG. Design and performance analysis of high-orbit observation system at earth-moon libration points[J]. Systems Engineering and Electronics, 2025, 47(2): 527-534.

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References 30

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平动点	轨道类型	轨道周期/d	轨道幅值/×10⁴ km	10y维持代价/(m/s)
L3	Lyapunov	27.4	均为x < 2	11.2
L4	拟周期	≈30	y < 4	＜2
L5	拟周期	≈30	z≈0	＜2

日期	覆盖方式	0°倾角目标弧长	5°倾角目标弧长	10°倾角目标弧长	15°倾角目标弧长
春分	双重覆盖	10.9	12.3	11.5	12.2
夏至	双重覆盖	22.5	23.6	21.3	23.6
夏至	三重覆盖	4.6	5.4	4.5	4.4
秋分	双重覆盖	12.2	13.1	13.0	12.9
冬至	双重覆盖	9.9	12.6	12.7	12.4

Design and performance analysis of high-orbit observation system at earth-moon libration points

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