›› 2014, Vol. 34 ›› Issue (1): 50-56.doi: 10.3780/j.issn.1000-758X.2014.01.007

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An On-orbit Calibration Method of KBR Phase Center

IN Ning1.2, QIU Le-de2, ZHANG Li-hua1, DING Yan-wei1   

  1. (1 DFH Satellite Co.Ltd,Beijing 100094) (2 China Academy of Space Technology,Beijing 100094)
  • Received:2013-03-27 Revised:2013-08-05 Online:2014-02-25 Published:2014-02-25

Abstract: An algorithm for on-orbit calibration of K band ranging (KBR) system phase center of the low-low satellite-to-satellite tracking (SST-LL) gravity satellite was proposed. Firstly, the attitude control algorithm was designed according to the calibration maneuver design, and the satellite control procedure was divided into thruster maneuver control procedure and stabilization control procedure. Secondly, the observation of KBR, GPS and star sensor were used to estimate the phase center of KBR based on extended Kalman filter. The pitch and yaw attitude control error are better than 1mrad, and the roll error is better than 3mard which indicates that the calibration attitude stabilization control can be realized. The calibration accuracy of three axises are all better than 1mm, which verify the fast convergence rate and the steady accuracy of the algorithm.

Key words: K band ranging system, Phase center, On-orbit calibration, Attitude control, Extended Kalman filter, Gravity satellite