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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (3): 526641-526641.doi: 10.7527/S1000-6893.2021.26641

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Orbit determination analysis using Crab observation data of GECAM mission

Dawei HAN(), Shijie ZHENG, Youli TUO, Mingyu GE, Liming SONG, Xinqiao LI, Xiangyang WEN, Shaolin XIONG   

  1. Key Laboratory of Particle Astrophysics,The Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
  • Received:2021-11-09 Revised:2021-12-04 Accepted:2022-04-08 Online:2023-02-15 Published:2022-04-24
  • Contact: Dawei HAN E-mail:dwhan@ihep.ac.cn
  • Supported by:
    Strategic Priority Program on Space Science, the Chinese Academy of Sciences(XDA15360300);National Natural Science Foundation of China(U1838101)

Abstract:

Huairou-I, the Gravitational Wave High-Energy Electromagnetic Counterpart All-Sky Monitor (GECAM) satellite, is used to monitor various types of Gravitational Wave Bursts (GWBs), Fast Radio Bursts (FRBs), and Gamma-Ray Bursts (GRBs). Thanks to the novel design using silicon photoelectric multipliers instead of traditional devices in the GRD detector and electronics, GECAM features a high time resolution (0.1 μs), time accuracy (~ 3 μs), and wide field of view, and reduces the weight greatly. In this work, we report our results of testing pulsar navigation with GECAM observations. The Significance Enhancement of Pulse-profile with Orbit-dynamics (SEPO) algorithm combines orbit dynamics and pulsar profile analysis for the first time in China, which has been used in the POLAR and Insight-HXMT Satellite. With 40 days observations of the Crab pulsar, the GECAM-B orbit is determined successfully. The parameter values of the orbital elements are solved and the errors are estimated by the bootstrap method. The errors with 99.7% confidence are semi-major axis error of 5.85 m, eccentricity error of 0.000 121, inclination error of 0.013 1°, RAAN error of 0.165°, error for argument of perigee of 0.216°, and mean anomaly error of 0.217°. The experiment proves that the small satellites used for gamma-ray burst monitoring can be also used to determine the orbit by the pulsar, which provides a new idea for pulsar orbit determination and navigation in the future.

Key words: Huairou-I, Crab, pulsar navigation, X-ray, orbital dynamics

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