Imaging probability analysis of low-Earth-orbit optical satellite based on roll angle constraint

doi:10.16708/j.cnki.1000-758X.2025.0032

Chinese Space Science and Technology ›› 2025, Vol. 45 ›› Issue (2): 140-149.doi: 10.16708/j.cnki.1000-758X.2025.0032

Imaging probability analysis of low-Earth-orbit optical satellite based on roll angle constraint

WANG Zhongguo^*

Institute of Remote Sensing Satellite， China Academy of Space Technology， Beijing 100094， China

Received:2023-02-01 Revision received:2023-04-24 Accepted:2023-05-10 Online:2025-03-13 Published:2025-04-01

Abstract

Abstract: Aiming at the Earth observation and imaging task of low-Earth-orbit optical satellite， the imaging probability distribution of the Earth surface target under the condition of satellite rolling attitude is studied. Firstly， the mathematical relationship between the imaging probability density function and the roll angle is analyzed analytically， and on this basis， the general formula of imaging probability in the roll angle range is given. Then， theoretical analysis and STK simulation analysis are carried out on the imaging probability of 15 combinations for five orbit altitude of 400km， 500km， 600km， 700km and 800km and three maximum roll angles of 30°， 45° and 60°. Finally， the theoretical results and simulation results are compared and analyzed. The results of data comparison show that the theoretical analysis formula has high accuracy with a relative error of no more than 2% in most cases. It can be used for rapid estimation of imaging probability， effectively reducing the workload of satellite multi-scheme comparison and analysis.

Key words: , low-Earth-orbit optical satellite, earth observation, roll angle constraint, imaging probability density, imaging probability

WANG Zhongguo. Imaging probability analysis of low-Earth-orbit optical satellite based on roll angle constraint[J]. Chinese Space Science and Technology, 2025, 45(2): 140-149.

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https://journal26.magtechjournal.com/kjkxjs/EN/Y2025/V45/I2/140

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Imaging probability analysis of low-Earth-orbit optical satellite based on roll angle constraint

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