Researches on the Application of Orbit Determination of Space debris Based on Photo-Electic Telescope Array

Subjects: Astronomy submitted time 2024-07-03 Cooperative journals: 《天文学进展》

DING Yi-gao LI Zhen-wei LIU Cheng-zhi KANG Zhe SUN Ming-guo SUN Jian-nan CHEN Long

Abstract： Photo-Electic Telescope array has many advantages, such as wide field of view, numerous units, wide coverage of space domain, high reliability and strong real-time prop#2;erty, which plays an increasingly important role in space debris survey. The duration of the observation data (arc length) based on photo-electric telescope array is usually less than 1% of the orbital period for space debris, which brings many difficulties to orbit determination (OD) and orbit predication (OP) of space debris. First, in order to solve association of space debris based on photo-electric telescope array, this paper utilizes the TLE data and SGP4/SDP4 model, has achieved association matching of space debris observation data. Subsequently, in order to verify the application accuracy based on photoelectric array sys#2;tem data, a method for calculating the ballistic coefficient of space debris was studied, and the average ballistic coefficient of space debris was calculated using the orbit determination results of observation data. Finally, in order to verify the data accuracy, orbit determination accuracy, and ballistic coefficient calculation accuracy based on the photoelectric array system, a verification method using laser ranging data as the real accuracy was designed. The experimental results show that the success rate of space debris association matching reaches 91.19%, and the observation accuracy of mini electro-optical array can reach 7.65′′. The experimental results also show that the precise orbit determination and three-day predic#2;tion for laser ranging satellite SENTINEL6A and HY2C are implemented, and the position prediction accuracy is 319.11 m and 107.25 m, and the velocity prediction accuracy is 0.26 m/s and 0.09 m/s, respectively. The root mean square error of the one-day prediction for the new two line elements generated by the calculated ballistic coefficient of target 36508 is 746.84 m, which is 0.25% less than the root mean square error of the publicly available data of 748.68 m, and the accuracy of the two is similar.The above data indicates that the system basically meets the requirements of conventional tasks.

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